Tricyclic 6-alkylidene-penems as beta-lactamase inhibitors

ABSTRACT

The present invention provides a compound of formula I, pharmaceutical compositions and the use thereof for the treatment of bacterial infection or disease in a patient in need thereof.

This application claims priority from copending provisional application Ser. No. 60/377,051, filed May 1, 2002, the entire disclosure of which is hereby incorporated by reference.

FIELD OF INVENTION

This invention relates to certain tricyclic 6-alkylidene penems which act as a broad spectrum β-lactamase inhibitors. β-Lactamases hydrolyze β-lactam antibiotics, and as such serve as the primary cause of bacterial resistance. The compounds of the present invention when combined with β-lactam antibiotics will provide an effective treatment against life threatening bacterial infections.

BACKGROUND OF THE INVENTION

Penicillins and cephalosporins are the most frequently and widely used β-lactam antibiotics in the clinic. However, the development of resistance to β-lactam antibiotics by different pathogens has had a damaging effect on maintaining the effective treatment of bacterial infections. (Coleman, K. Expert Opin. Invest. Drugs 1995, 4, 693; Sutherland, R. Infection 1995, 23 (4) 191; Bush, K, Cur. Pharm. Design 1999, 5, 839-845). The most significant known mechanism related to the development of bacterial resistance to the β-lactam antibiotics is the production of class-A, class-B and class-C serine β-lactamases. These enzymes degrade the β-lactam antibiotics, resulting in the loss of antibacterial activity. Class-A enzymes preferentially hydrolyze penicillins where as Class-C lactamases have a substrate profile favoring cephalosporin hydrolysis. (Bush, K.; Jacoby, G. A.; Medeiros, A. A. Antimicrob. Agents Chemother. 1995, 39, 1211). To date over 250 different β-lactamases have been reported (Payne, D. J,: Du, W and Bateson, J. H. Exp. Opin. Invest. Drugs 2000, 247) and there is a need for a new generation of broad spectrum β-lactamase inhibitors. Bacterial resistance to these antibiotics could be greatly reduced by administering the β-lactam antibiotic in combination with a compound which inhibits these enzymes.

The commercially available β-lactamase inhibitors such as clavulanic acid, sulbactam and tazobactam are all effective against class-A producing pathogens. Clavulanic acid is clinically used in combination with amoxicillin and ticarcillin; similarly sulbactam with ampicillin and tazobactam with piperacillin. However, these compounds are ineffective against class C producing organisms. The mechanism of inactivation of class-A β-lactamases (such as PCI and TEM-1) has been elucidated. (Bush, K.; Antimicrob. Agents Chemother. 1993, 37, 851; Yang, Y.; Janota, K.; Tabei, K.; Huang, N.; Seigal, M. M.; Lin, Y. I.; Rasmussen, B. A. and Shlaes, D. M. J. Biol. Chem. 2000, 35, 26674-26682).

In 1981, the Beecham group disclosed 6-alkylidine penems of general structure 1 as inhibitors of β-lactamases. [N. F. Osborne, U.S. Pat. No. 4,485,110 (1984); N. F. Osborne, Eur. Pat. Appl. 81 301683.9.]

R₁ and R₂ are independently hydrogen or a C₁₋₁₀ hydrocarbon group or mono heterocyclic, and R₃ represents a hydrogen or an organic group. Subsequently, the same group disclosed compounds of the general formula 1, wherein R₁ comprises a 1,2,3-triazole moiety. [N. F. Osborne, Eur. Pat. Appl. 84301255.0]. The following year, the same group filed three patent applications of the structure 1, wherein R₁ is an optionally substituted six membered or five membered mono aromatic ring system. [N. F. Osborne, Eur. Pat. Appl. 85100520.7; Eur. Pat. Appl. 85100521.5 and Eur. Pat. Appl. 85300456.2]. European patent application No. 86305585.1 discloses the synthesis and the utility of (Z)-6-(1-methyl-1,2,3-triazol-4-ylmethylene)-penem-3-carboxylate 2 as a class-A and class-C β-lactamase inhibitor.

Eur. Pat. Appl. 86305584.4 disclosed the preparation of compounds of general formula 1, wherein R₁=non-aromatic heterocyclic group and a PCT application [N. J. Broom; P. D. Edwards, N. F. Osborne and S. Coulton PCT WO 87/00525] disclosing R₁=fused bicyclic hetero-aromatic group was published. Similarly patent applications [N. J. Broom; G. Brooks; S. Coulton, Eur. Pat. Appl. 88311786.3; N. J. Broom; G. Brooks; B. P. Clarke, Eur. Pat. Appl. 88311787.1) disclosed the preparation and use of compounds of general structure 1, wherein R₁ is a substituted five membered hetero-aromatic ring. A process for the preparation of compounds of general formula 1 has been disclosed by Coulton, et al. [S. Coulton; J. B. Harbridge; N. F. Osborne and G. Walker Eur. Pat. Appl. No 87300193.7]

In the year 1993, Beecham disclosed [A. V. Stachulski and R. walker, PCT WO 93/03042] the preparation and the use of compounds of general formula 1, in which R₁=(Cue) alkyl and R₂═CH₂X or COY wherein X=halogen or CONR₂.

During the last decade three patents have been filed by Beecham describing compounds of general formula 3. [N. J. Broom; F. P. Harrington, PCT WO 94/10178; K. Coleman; J. E. Neale PCT WO 95/28935; K. Coleman; J. E. Neale PCT WO 95/17184] wherein R_(a)=hydrogen or an organic group, and R_(d) and R_(e) may be both hydrogen or one or more substituents replacing hydrogen atoms in the ring system shown below.

BRIEF SUMMARY OF THE INVENTION

The present invention relates to novel, low molecular weight broad spectrum β-lactam compounds and in particular to a class of tricyclic heteroaryl substituted 6-alkylidene penems which have β-lactamase inhibitory and antibacterial properties. The compounds are therefore useful in the treatment of antibacterial infections in humans or animals, either alone or in combination with other antibiotics.

In accordance with the present invention there are provided compounds of general formula I or a pharmaceutically acceptable salt or in vivo hydrolysable ester thereof:

wherein:

-   One of A and B denotes hydrogen and the other an optionally     substituted fused tricyclic heteroaryl group; -   X is S or O, preferably S; -   R₅ is H, an in vivo hydrolyzable ester such as C1-C6 alkyl, C5-C6     cycloalkyl, CHR₃OCOC1-C6 or salts such as Na, K, Ca; and -   R₃ is hydrogen, C1-C6 alkyl, C3-C6 cycloalkyl, optionally     substituted aryl, optionally substituted heteroaryl.

DETAILED DESCRIPTION OF THE INVENTION

In accordance with the present invention there are provided compounds of general formula I or a pharmaceutically acceptable salt or in vivo hydrolysable ester thereof:

wherein:

-   One of A and B denotes hydrogen and the other an optionally     substituted fused tricyclic heteroaryl group; -   X is S or O, preferably S; -   R₅ is H, an in vivo hydrolyzable ester such as C1-C6 alkyl, C5-C6     cycloalkyl, CHR₃OCOC1-C6 or salts such as Na, K, Ca; preferable R₅     groups are H or salts.

The expression “Fused tricyclic heteroaryl group” is used in the specification and claims to mean:

a group comprising three fused rings in which at least one ring has aromatic character (i.e meets Huckel's rule (4n+2)). The fused tricyclic heteroaryl group contains 1-6 heteroatoms selected from the group consisting of O, S, N and N—R₁. The fused tricyclic heteroaryl must be bonded through a carbon preferably in one of the at least one aromatic rings to the remainder of the formula I molecule. The fused tricyclic heteroaryl group may contain 1-3 aromatic rings and 0-2 non-aromatic rings. Each aromatic ring(s) in the fused tricyclic heteroaryl group may contain 5 to 7 ring atoms (including the bridgehead atoms) selected from CR₂, O, S, N, and N—R₁. Each of the aromatic ring(s) of the fused tricyclic heteroaryl group may contain 0 to 3 heteroatoms selected from O, S, N or N—R₁. The non-aromatic ring(s), if any, of the fused tricyclic heteroaryl group may contain 5-8 ring atoms (including bridgehead atoms) and contain 0-4 heteroatoms selected from N, N—R₁, O or S(O)_(n), wherein n is 0-2. In each non-aromatic ring of the fused tricyclic heteroaryl group, one or two of the non-bridgehead carbon atoms may each be optionally substituted with one or two R₄, and each R₄ may be independently the same or different. Examples of fused tricyclic heteroaryl are optionally substituted ring systems such as imidazo[2,1-b]1,3]benzothiazole optionally substituted e.g., by for example C1-C6alkyl, C1-C6alkoxy or halo (such as chlorine or fluorine); imidazo[1,2-a]quinoline; 6,7-dihydro-5H-cyclopenta[d]imidazo[2,1-b][1,3]thiazole; imidazo[1,2-a]quinoxaline; 5,6,7,8-tetrahydro-[1,2,4]triazolo[1,5-a]pyridine dibenzo[b,f][1,4]-oxazepin-11(10H)-one optionally substituted e.g., by arylalkyl such as benzyl; 7,8-dihydro-6H-3,4,8b-triaza-as-indacene optionally substituted by C1-C6 alkoxy; 4H,10H-pyrazolo[5,1-c][1,4]benzoxazepine optionally substituted e.g., by C1-C6 alkoxy; 5H-Imidazo[2,1-a]isoindole; 5,8-dihydro-6H-imidazo[2,1-b]pyrano[4,3-d][1,3]thiazole; imidazo[2,1-b]benzothiazole; [1,3]thiazolo[3,2-a]benzimidazole; 7,8-dihydro-6H-cyclopenta[3,4]pyrazolo[5,1-b][1,3]thiazole; 5,6,7,8-tetrahydroimidazo[2,1-b][1,3]-benzothiazole; 9H-imidazo[1,2-a]benzimidazole optionally substituted e.g., by C1-C6alkyl; 4H-thieno[2′,3′:4,5]thiopyrano[2,3-b]pyridine; 7,8-dihydro-6H-cyclopenta[e][1,2,4]-triazolo[1,5-a]pyrimidine optionally substituted e.g., by C1-C6alkyl; 6,7,8,9-tetrahydropyrido[3,4-e][1,2,4]triazolo[1,5-a]pyrimidine optionally substituted e.g., by C2-C7alkoxycarbonyl; 8′,9′-dihydro-6′H-spiro[1,3-dioxolane-2,7′-[1,2,4]triazolo[1,5-a]-quinazoline; 6,7,8,9-tetrahydro[1,2,4]triazolo[1,5-a]quinazoline optionally substituted e.g., by C1-C6alkyl; 7,8-dihydro-6H-cyclopenta[e]imidazo[1,2-a]pyrimidine optionally substituted e.g., by C1-C6alkoxy; 7,8-dihydro-6H-cyclopenta[e]imidazo[1,2-a]pyrimidinyl optionally substituted e.g., by arylalkyloxyalkyloxy; 3-dihydro[1,3]thiazolo[3,2-a]-benzimidazole; 2,3-dihydro[1,3]thiazolo[3,2-a]benzimidazole; 4-dihydro-2H-[1,3]thiazino[3,2-a]-benzimidazole; [1,3]thiazolo[3,2-a]benzimidazole; 7,8-dihydro-5H-pyrano[4,3-d]pyrazolo[5,1-b][1,3]-oxazole; 5,6,7,8-tetrahydropyrazolo[5,1-b][1,3]benzoxazole; and 5,6,7,8-tetrahydropyrazolo[5′,1′:2,3][1,3]oxazolo[5,4-c]pyridine optionally substituted e.g., by C2-C7alkoxycarbonyl.

R₁ is H, optionally substituted —C1-C6 alkyl, optionally substituted -aryl, optionally substituted -heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted —C3-C7 cycloalkyl, optionally substituted —C3-C6 alkenyl, optionally substituted —C3-C6 alkynyl with the proviso that both the double bond and the triple bond should not be present at the carbon atom which is directly linked to N; optionally substituted —C1-C6 per fluoro alkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═O(C1-C6) alkyl, optionally substituted —C═O(C3-C6) cycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkyl aryl, optionally substituted C1-C6 alkyl heteroaryl, optionally substituted aryl-C1-C6 alkyl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkyl aryloxyheteroaryl, optionally substituted alkyl aryloxy alkylamines, optionally substituted alkoxy carbonyl, optionally substituted aryloxy carbonyl, optionally substituted heteroaryloxy carbonyl. Preferred R₁ groups are H, optionally substituted alkyl, optionally substituted aryl, —C═O(C1-C6)alkyl, C3-C6alkenyl, C3-C6alkynyl, optionally substituted cycloalkyl, SO₂alkyl, SO₂aryl, optionally substituted heterocycles, —CONR₆R₇, and optionally substituted heteroaryl.

R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl having 1 to 2 double bonds, optionally substituted C2-C6 alkynyl having 1 to 2 triple bonds, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkyl aryloxy alkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylene dioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)— optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted C1-C6 alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted alkylaryloxyalkylamines, optionally substituted C3-C7 cycloalkyl, optionally substituted C3-C7 saturated or partially saturated heterocycle. Preferred R₂ groups are H, optionally substituted alkyl, optionally substituted alkoxy, optionally substituted heteroaryl, halogen, CN, hydroxy, optionally substituted heterocycle, —CONR₆R₇, COOR₆, optionally substituted aryl, S(O)_(q)— alkyl, and S(O)_(q)-aryl.

R₃ is hydrogen, C1-C6 alkyl, C3-C6 cycloalkyl, optionally substituted aryl, optionally substituted heteroaryl. Preferred R₃ groups are H or C1-C6 alkyl.

R₄ is H, optionally substituted C1-C6 alkyl, one of R₄ is OH, C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S═(O)_(n) (where n=0 to 2), N—R₁; preferred R₄ groups are H, C1-C6 alkyl, NR₆R₇, or R₄R₄ together with the carbon to which they are attached forming a spiro system of five to eight members.

R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, R₆ and R₇ can together with the nitrogen to which they are attached form a 3-7 membered saturated ring system optionally having one or two heteroatoms such as N—R₁, O, S═(O)_(n) n=0-2. Preferred R₆R₇ groups are H, C1-C6 alkyl, arylalkyl, heteroarylalkyl, or R₆R₇ together with the nitrogen to which they are attached forming a 3-7 membered saturated ring system.

Chemical Definitions

The term alkyl means both straight and branched chain alkyl moieties of 1-12 carbons, preferably of 1-6 carbon atoms.

The term alkenyl means both straight and branched alkenyl moieties of 2-8 carbon atoms containing at least one double bond, and no triple bond, preferably the alkenyl moiety has 1 or two double bonds. Such alkenyl moieties may exist in the E or Z conformations; the compounds of this invention include both conformations. In the case of alkenyl, hetero atoms such as O, S or N—R₁ should not be present on the carbon that is bonded to a double bond;

The term alkynyl includes both straight chain and branched alkynyl moieties containing 2-6 carbon atoms containing at least one triple bond, preferably the alkynyl moiety has one or two triple bonds. In the case of alkynyl, hetero atoms such as O, S or N—R₁, should not be present on the carbon that is bonded to a double or triple bond;

The term cycloalkyl refers to a alicyclic hydrocarbon group having 3-7 carbon atoms. The term perfluoroalkyl is used herein to refer to both straight- and branched-chain saturated aliphatic hydrocarbon groups having at least one carbon atom and two or more fluorine atoms. Examples include CF₃, CH₂CF₃, CF₂CF₃ and CH(CF₃)₂. The term halogen is defined as Cl, Br, F, and I.

If alkyl, alkenyl, alkynyl, or cycloalkyl is “optionally substituted”, one or two of the following are possible substituents: nitro, -aryl, -heteroaryl, alkoxycarbonyl-, -alkoxy, -alkoxy-alkyl, alkyl-O—C2-C4alkyl-O—, -cyano, -halogen, -hydroxy, —N—R₆R₇, -trifluoromethyl, -trifluoromethoxy, arylalkyl, alkylaryl, R₆R₇N-alkyl-, HO—C1-C6-alkyl-, alkoxyalkyl-, alkyl-S—, —SO₂N—R₆R₇, —SO₂NHR₆, —CO₂H, CONR₆R₇, aryl-O—, heteroaryl-O—, —S(O)_(s)-aryl (where s=0-2), -alkyl-O-alkyl-NR₆R₇, -alkyl-aryl-O-alkylN-R₆R₇, C1-C6alkyl, alkenyl, alkynyl, cycloalkyl, alkoxy-alkyl-O—, R₆R₇N-alkyl-, and —S(O)_(s)-heteroaryl (where s=0-2); Preferred substitutents for alkyl, alkenyl, alkynyl, and cycloalkyl include: halogen, nitro, aryl, heteroaryl, alkoxycarbonyl-, alkoxy, -alkoxy-alkyl, -cyano, hydroxy, and —N—R₆R₇.

Aryl is defined as an aromatic hydrocarbon moiety selected from the group: phenyl, α-naphthyl, β-naphthyl, biphenyl, anthryl, tetrahydronaphthyl, fluorenyl, indanyl, biphenylenyl, acenaphthenyl, groups.

Heteroaryl is defined as a aromatic heterocyclic ring system (monocyclic or bicyclic) where the heteroaryl moieties are selected from: (1) furan, thiophene, indole, azaindole, oxazole, thiazole, isoxazole, isothiazole, imidazole, N-methylimidazole, pyridine, pyrimidine, pyrazine, pyrrole, N-methylpyrrole, pyrazole, N-methylpyrazole, 1,3,4-oxadiazole, 1,2,4-triazole, 1-methyl-1,2,4-triazole, 1H-tetrazole, 1-methyltetrazole, benzoxazole, benzothiazole, benzofuran, benzisoxazole, benzimidazole, N-methylbenzimidazole, azabenzimidazole, indazole, quinazoline, quinoline, and isoquinoline; (2) a bicyclic aromatic heterocycle where a phenyl, pyridine, pyrimidine or pyridizine ring is: (a) fused to a 6-membered aromatic (unsaturated) heterocyclic ring having one nitrogen atom; (b) fused to a 5 or 6-membered aromatic (unsaturated) heterocyclic ring having two nitrogen atoms; (c) fused to a 5-membered aromatic (unsaturated) heterocyclic ring having one nitrogen atom together with either one oxygen or one sulfur atom; or (d) fused to a 5-membered aromatic (unsaturated) heterocyclic ring having one heteroatom selected from O, N or S.

If aryl or heteroaryl is ‘optionally substituted’, one or two of the following are possible substituents: nitro, -aryl, -heteroaryl, alkoxycarbonyl-, -alkoxy, -alkoxy-alkyl, alkyl-O—C2-C4alkyl-O—, -cyano, -halogen, -hydroxy, —N—R₆R₇, -trifluoromethyl, -trifluoromethoxy, arylalkyl, alkylaryl, R₆R₇N-alkyl-, HO—C1-C6-alkyl-, alkoxyalkyl-, alkyl-S—, —SO₂N—R₆R₇, —SO₂NHR₆, —CO₂H, CONR₆R₇, aryl-O—, heteroaryl-O—, —S(O)_(s)-aryl (where s=0-2), -alkyl-O-alkyl-NR₆R₇, -alkyl-aryl-O-alkylN-R₆R₇, C1-C6alkyl, alkenyl, alkynyl, cycloalkyl, alkoxy-alkyl-O—, R₆R₇N-alkyl-, and —S(O)_(s)-heteroaryl (where s=0-2); Preferred substituents for aryl and heteroaryl include: alkyl, halogen, —N—R₆R₇, trifluoromethyl, -trifluoromethoxy, arylalkyl, and alkylaryl.

Arylalkyl is defined as Aryl-C1-C6alkyl-; Arylalkyl moieties include benzyl, 1-phenylethyl, 2-phenylethyl, 3-phenylpropyl, 2-phenylpropyl and the like. The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents on the alkyl or aryl moiety as defined above.

Alkylaryl is defined as C1-C6alkyl-aryl-. The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents on the aryl or alkyl moiety as defined above.

Heteroaryl-C1-C6— alkyl is defined as a heteroaryl substituted alkyl moiety wherein the alkyl chain is 1-6 carbon atoms (straight or branched). Alkyl heteroaryl moieties include Heteroaryl-(CH₂)₁— and the like. The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents on the alkyl or heteroaryl moiety as defined above;

C1-C6 alkylheteroaryl is defined an alkyl chain of 1-6 carbon atoms (straight or branched) attached to a heteroaryl moiety, which is bonded to the rest of the molecule. Ex. C1-C6-alkyl-Heteroaryl-. The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents on the alkyl or heteroaryl moiety as defined above;

Saturated or partially saturated heterocycles groups are defined as heterocyclic rings selected from the moieties; aziridinyl, azetidinyl, 1,4-dioxanyl, hexahydroazepinyl, piperazinyl, piperidinyl, pyrrolidinyl, morpholinyl, thiomorpholinyl, dihydrobenzimidazolyl, dihydrobenzofuranyl, dihydrobenzothienyl, dihydrobenzoxazolyl, dihydrofuranyl, dihydroimidazolyl, dihydroindolyl, dihydroisooxazolyl, dihydroisothiazolyl, dihydrooxadiazolyl, dihydrooxazolyl, dihydropyrrazinyl, dihydropyrazolyl, dihydropyridinyl, dihydropyrimidinyl, dihydropyrrolyl, dihydroquinolinyl, dihydrotetrazolyl, dihydrothiadiazolyl, dihydrothiazolyl, dihydrothienyl, dihydrotriazolyl, dihydroazetidinyl, dihydro-1,4-dioxanyl, tetrahydrofuranyl, tetrahydrothienyl, tetrahydroquinolinyl, and tetrahydroisoquinolinyl

C1-C6 alkyl mono or bicyclic saturated or partially saturated heterocycles is defined as an alkyl group (straight or branched) of C1-C6 attached to a heterocycles (which is defined before) through a carbon atom or a nitrogen atom and the other end of the alkyl chain attached to the rest of the molecule. The terms ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present on the alkyl or heterocyclic portion of the molecule, as defined before;

Arylalkyloxyalkyl is defined as Aryl-C1-C6alkyl-O—C1-C6alkyl-. The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present on the alkyl and/or aryl portions as defined before;

Alkyloxyalkyl is defined as C1-C6 alkyl-O—C1-C6alkyl-. The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present at the alkyl moiety as defined before;

Aryloxyalkyl is defined as Aryl-O—C1-C6 alkyl-. The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present at the alkyl or aryl moiety as defined before;

Heteroarylalkyloxyalkyl is defined as Heteroaryl-C1-C6alkyl-O—C1-C6alkyl-. The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present on the alkyl or heteroaryl moiety as defined before;

Aryloxyaryl is defined as Aryl-O-Aryl-. The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present on the aryl moiety as defined before;

Aryloxyheteroaryl is defined as Aryl-O-Heteroaryl- or -Aryl-O-Heteroaryl; In this definition either the aryl moiety or the heteroaryl moiety can be attached to the remaining portion of the molecule; The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present on the aryl moiety or on the heteroaryl moiety as defined before;

Alkyl aryloxyaryl is defined as Aryl-O-Aryl-C1-C6alkyl-; The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present at the aryl moiety as defined before;

Alkylaryloxyheteroaryl is defined as Heteroaryl-O-Aryl-C1-C6alkyl-; The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present on the aryl moiety or on the hetroaryl moiety as defined before;

Alkylaryloxyalkylamine is defined as R₆R₇N—C1-C6alkyl-O-Aryl-C1-C6alkyl-; The terms ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present on the alkyl or aryl moiety as defined before; R₆R₇ as defined before;

Alkoxycarbonyl is defined as C1-C6alkyl-O—C═O—; The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present on the alkyl portion of the alkoxy moiety as defined before;

Aryloxycarbonyl is defined as Aryl-O—C═O—; The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present at the aryl moiety as defined before;

Heteroaryloxy carbonyl is defined as Heteroaryl-O—C═O—; The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present at the heteroaryl moiety as defined before;

Alkoxy is defined as C1-C6alkyl-O—; The terms ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present at the alkyl moiety as defined before;

Aryloxy is defined as Aryl-O—; The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present at the aryl moiety as defined before;

Heteroaryloxy is defined as Heteroaryl-O—; The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present at the heteroaryl moiety as defined before;

Alkenyloxy is defined as C3-C6 alkene-O—; Example allyl-O—, but-2-ene-O or like moieties; The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present at the alkene moiety as defined before, with the proviso that no hetero atom such as O, S or N—R₁, is present on the carbon atom, which is attached to a double bond;

Alkynyloxy is defined as C3-C6alkyne-0—; Example CH triple bond C—CH₂—O—, or like moieties; The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present at the alkyne moiety as defined before, with the proviso that no hetero atom such as O, S or N—R₁, is present on a carbon atom which is attached to a double or triple bond;

Alkylaminoalkoxy is defined as R₆R₇N—C1-C6-alkyl-O—C1-C6-alkyl-, where the terminal alkyl group attached to the oxygen is connected to the rest of the molecule;

The terms R₆ and R₇ are defined above; The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present at the alkyl moiety as defined before;

Alkylenedioxy is defined as (CH₂)₂—-0—-;

Aryloxyalkylamine is defined as R₆R₇N—C1-C6-alkyl-O-Aryl-, where the aryl is attached to the rest of the molecule; The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present at the alkyl or aryl moiety as defined before;

Arylalkenyl is defined as Aryl-C2-C8alkene-, with the proviso that no hetero atom such as O, S or N—R₁ is present on the carbon atom, which is attached to a double bond; The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present on the alkene or aryl moiety as defined before;

Heteroaryloxyalkyl is defined as Heteroaryl-O—C1-C6alkyl-; The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present at the heteroaryl moiety as defined before;

Heteroaryloxyaryl is defined as Heteroaryl-O-aryl-, where the aryl moiety is attached to the rest of the molecule; The term ‘optionally substituted’ refers to unsubstituted or substituted with 1 or 2 substituents present at the heteroaryl moiety or the aryl moiety as defined before;

Alkoxy, alkoxyalkyl, alkoxyalkyloxy and alkylthioalkyloxy are moieties wherein the alkyl chain is 1-6 carbon atoms (straight or branched). Aryloxy, heteroaryloxy, arylthio and heteroarylthio are moieties wherein the aryl and heteroaryl groups are as herein before defined. Arylalkyloxy, heteroarylalkyloxy, arylalkylthio and heteroarylalkylthio are moieties wherein the aryl and heteroaryl groups are as herein before defined and wherein the alkyl chain is 1-6 carbons (straight or branched). Aryloxyalkyl, heteroaryloxyalkyl, aryloxyalkyloxy and heteroaryloxyalkyloxy are substituents wherein the alkyl radical is 1-6 carbon atoms. The terms monoalkylamino and dialkylamino refer to moieties with one or two alkyl groups wherein the alkyl chain is 1-6 carbons and the groups may be the same or different. The terms monoalkylaminoalkyl and dialkylaminoalkyl refer to monoalkylamino and dialkylamino moieties with one or two alkyl groups (the same or different) bonded to the nitrogen atom which is attached to an alkyl group of 1-3 carbon atoms.

Pharmaceutically acceptable salts are those salts which may be administered or provided to a warm blooded animal, preferably sodium, potassium or calcium alkaline earth metal salts.

Preferably the formula I compound has the following stereochemistry:

Examples of Tricyclic Heteroarylgroup A and B: Ring Size and Arrangements: (5-5-5)

In both formula 1-A and 1-B Z₁, Z₂,Z₃, Z₄, Z₅, Z₆ and Z₇ are independently selected from CR₂, N, O, S or N—R₁ and as mentioned above one of Z₁-Z₇ is a carbon atom to which the remainder of the molecule is attached. Y₁, Y₂, Y₃ and Y₄ may independently be C or N. Ring Size and Arrangement: (5-5-6)

In both formula 2-A and 2-B Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ and Z₈ are independently selected from CR₂, N, O, S or N—R₁ and as mentioned above one of the Z₁-Z₈ is a carbon atom to which the remainder of the molecule is attached. Y₁, Y₂, Y₃ and Y₄ may be independently be C or N. Ring Size and Arrangement: (5-6-5)

In both formula 3-A and 3-B Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ and Z₈ are independently selected from CR₂, N, O, S or N—R₁ and as mentioned above one of Z₁-Z₈ is a carbon atom to which the remainder of the molecule is attached. Y₁, Y₂, Y₃ and Y₄ may be C or N. Ring Size and Arrangements: (5-6-6)

In formula 4-A, 4-B and 4-C Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ and Z₈ are independently selected from CR₂, N, O, S or N—R₁ and as mentioned above one of the Z₁-Z₈ is a carbon atom to which the remainder of the molecule is attached. Y₁, Y₂, Y₃ and Y₄ are independently C or N. Ring Size and Arrangements: [5-5-(Non-Aromatic)]

In both formula 5-A and 5-B Z₁, Z₂, Z₃ and Z₄ are indpendently selected from CR₂, N, O, S or N—R₁ and as mentioned above one of the Z₁-Z₄ is a carbon atom to which the remainder of the molecule is attached; Y₁, Y₂, Y₃ and Y₄ are independently C or N. W₁, W₂ and W₃ are independently selected from CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; and t=1 to 3. Ring Size and Arrangement: [5-6-(Non-Aromatic)]

In formulae 6-A, 6-B and 6-C Z₁, Z₂, Z₃, Z₄ and Z₅ are indepedently selected from CR₂, N, O, S or N—R₁ and as mentioned above one of the Z₁-Z₅ is a carbon atom to which the remainder of the molecule is attached. Y., and Y₂ are independently C or N. W₁, W₂ and W₃ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; and t=1 to 3. Ring Size and Arrangement: [5-(Non-Aromatic)-5]

In formulae 7-A and 7-B Z₁, Z₂, Z₃, Z₄, Z₅ and Z₆ are independently selected from CR₂, N, O, S, and N—R₁; one of Z₁-Z₆ is a carbon atom to which the remainder of the molecule is attached. Y_(1,), Y₂, Y₃ and Y₄ are independently C or N. W₁ and W₂ are independently selected from CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; and t=1 to 3. Ring Size and Arrangement: [5-(Non-Aromatic)-6]

In formulae 8-A and 8-B Z₁, Z₂, Z₃, Z, Z₅, Z₆ and Z₇ are indepdently selected from CR₂, N, O, S and N—R₁ and as mentioned above one of the Z₁-Z₇ is a carbon atom to which the remainder of the molecule is attached. Y_(1,), Y₂, Y₃ and Y₄ are independently C or N. W₁ and W₂ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; and t=0-3. Ring Size and Arrangement [5-(Non-Aromatic)-(Non-Aromatic)]

In formulae 9-A and 9-B Z₁, Z₂ and Z₃ are independently selected from CR₂ N, O, S or N—R₁; one of Z₁-Z₃ is a carbon atom to which the remainder of the molecule is attached. Y₁ and Y₄ are independently C or N; Y₂ and Y₃ are independently CH or N; W₁, W₂ W₃, W₄ and W₅ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; t=0 to 2 and u=1 to 3. Ring Size and Arrangement (6-5-6)

In formula 10-A and 10-B Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ and Z₉ are independently selected from CR₂, N, O, S or N—R₁ and as mentioned above one of the Z₁-Z₉ is a carbon atom to which the remainder of the molecule is attached. Y₁, Y₂, Y₃ and Y₄ are independently C or N. Ring Size and Arrangement (6-6-6)

In formula 11-A, 11-B and 11-C Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈, Z₉ and Z₁₀ are independently CR₂, N, O, S or N—R₁; one of the Z₁-Z₁₀ is a carbon atom to which the remainder of the molecule is attached. Y₁, Y₂, Y₃ and Y₄ are independently C or N. Ring Size and Arrangement [6-5-(Non-Aromatic)]

In formula 12-A and 12-B Z₁, Z₂, Z₃, Z₄ and Z₅ are independently CR₂, N, O, S or N—R₁ with the proviso that one of Z₁-Z₅ is a carbon atom to which the remainder of the molecule is attached. Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁, W₂, W₃ are independently CR₄R₄ O, N—R₁, or S═(O)_(r) (r=0-2) with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; and t=14. Ring Size and Arrangement [6-6-(Non-Aromatic)]

In formula 13-A, 13-B and 13-C Z₁, Z₂, Z₃, Z₄, Z₅ and Z₆ are independently CR₂, N, O, S or N—R₁; one of Z₁-Z₆ is a carbon atom to which the remainder of the molecule is attached. Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁, W₂ and W₃ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; and t=1 to 3. Ring Size and Arrangement [6-(Non-Aromatic)-6]

In formula 14-A, 14-B and 14-C Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ and Z₈ are independently CR₂, N, O, S or N—R₁; one of Z₁-Z₈ is a carbon atom to which the remainder of the molecule is attached. Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁ and W₂ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; and t=1 to 2. Ring Size and Arrangement [6-(Non-Aromatic)-(Non-Aromatic)]

In formula 15-A, 15-B and 15-C Z₁, Z₂, Z₃ and Z₄ are independently CR₂, N, O, S or N—R₁; one of Z₁-Z₄ is a carbon atom to which the remainder of the molecule is attached. Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁, W₂, W₃, W₄ and W₅ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; t=1 to 3 and u=1 to 3.

The preferred embodiments of formula 1-A are:

-   1. Z₁ is O, S, or N—R₁; Z₂, Z₃, Z₄, Z₅, Z₆ and Z₇ are independently     CR₂, or N; Y₁, Y₂, Y₃, Y₄ are C; any one of Z₂, Z₃, Z₄, Z₅, Z₆, Z₇     is a carbon to which the remainder of the molecule is attached. -   2. Z₁ is O, S, or N—R₁; Z₂, Z₃, Z₄, Z₅, Z₆ and Z₇ are independently     CR₂; Y₁, Y₂, Y₃, and Y₄ are C; one of Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ is a     carbon to which the remainder of the molecule is attached. -   3. Z₂ is O, S, or N—R₁; Z₁, Z₃, Z₄, Z₅, Z₆ and Z₇ are independently     CR₂, or N; Y₁, Y₂, Y₃, Y₄ are C; one of Z₁, Z₃, Z₄, Z₅, Z₆, Z₇ is a     carbon to which the remainder of the molecule is attached. -   4. Z₂ is O, S, or N—R₁; Z₁, Z₃, Z₄, Z₅, Z₆ and Z₇ are independently     CR₂; Y₁, Y₂, Y₃, Y₄ are C; one of Z₁, Z₃, Z₄, Z₅, Z₆, Z₇ is a carbon     to which the remainder of the molecule is attached. -   5. Z₃ is O, S, or N—R₁; Z₁, Z₂, Z₄, Z₅, Z₆, Z₇ are independently     CR₂, or N; Y₁, Y₂, Y₃, Y₄ are C; one of Z₁, Z₂, Z₄, Z₅, Z₆, Z₇ is a     carbon to which the remainder of the molecule is attached. -   6. Z₃ is O, S, or N—R₁; Z₁, Z₃, Z₄, Z₅, Z₆, Z₇ are independently     CR₂; Y₁, Y₂, Y₃, Y₄ are C; one of Z₁, Z₃, Z₄, Z₅, Z₆, or Z₇ is a     carbon to which the remainder of the molecule is attached. -   7. Z₇ is O, S, or N—R₁; Z₁, Z₂, Z₃, Z₄, Z₅ and Z₆ are independently     CR₂ or N; Y₁, Y₂, Y₃, Y₄ are C; one of Z₁, Z₂, Z₃, Z₄, Z₅ and Z₆ is     a carbon to which the remainder of the molecule is attached. -   8. Z₇ is O, S, or N—R₁; Z₁, Z₂, Z₃, Z₄, Z₅ and Z₁ are independently     CR₂; Y₁, Y₂, Y₃, Y₄ are C; any of Z₁, Z₂, Z₃, Z₄, Z₅ and Z₆ is a     carbon to which the remainder of the molecule is attached. -   9. Z₁, Z₄, and Z₁ are independently O, S, or N—R₁; Z₂, Z₃, Z₅, Z₇     are independently CR₂, or N; Y₁, Y₂, Y₃, Y₄ are C; any one of Z₂,     Z₃, Z₅, or Z₇ is a carbon to which the remainder of the molecule is     attached. -   10. Z₁, Z₄, and Z₆ are independently O, S, or N—R₁; Z₂, Z₃, Z₅, Z₇     are independently CR₂; Y₁, Y₂, Y₃, Y₄ are C; any one of Z₂, Z₃, Z₅,     or Z₇ is a carbon to which the remainder of the molecule is     attached. -   11. Z₃, Z₄, and Z₆ are independently O, S, or N—R₁; Z₁, Z₂, Z₅, Z₇     are independently CR₂, or N; Y₁, Y₂, Y₃, Y₄ are C; any one of Z₁,     Z₂, Z₁, or Z₇ is a carbon to which the remainder of the molecule is     attached. -   12. Z₃, Z₄, and Z₆ are independently O, S, or N—R₁; Z₂, Z₃, Z₅, Z₇     are independently CR₂; Y₁, Y₂, Y₃, Y₄ are C; any one of Z₁, Z₂, Z₅,     or Z₇ is a carbon to which the remainder of the molecule is     attached. -   13. Z₁ is O, S, or N—R₁; Z₂, Z₃, Z₄, Z₅, Z₁ and Z₇ are independently     CR₂, or N; Y₂ is N; Y₁, Y₃, Y₄ are C; any one of Z₂, Z₃, Z₄, Z₅, Z₆,     or Z₇ is a carbon to which the remainder of the molecule is     attached. -   14. Z₁ is O, S, or N—R₁; Z₂, Z₃, Z₄, Z₅, Z₆ and Z₇ are independently     CR₂; Y₂ is N; Y₁, Y₃, Y₄ are C; one of Z₂, Z₃, Z₄, Z₅, Z₆, or Z₇ is     a carbon to which the remainder of the molecule is attached. -   15. Z₂ and Z₄ are independently O, S, or N—R₁; Z₁, Z₃, Z₅, Z₆, Z₇     are independently CR₂, N; Y, is N; Y₂, Y₃, Y₄ are C; any one of Z₁,     Z₃, Z₅, Z₆, or Z₇ is a carbon to which the remainder of the molecule     is attached. -   16. Z₂ and Z₄ are independently O, S, or N—R₁; Z₁, Z₃, Z₅, Z₆, Z₇     are independently CR₂; Y₁ is N; Y₂, Y₃, Y₄ are C; any one of Z₁, Z₃,     Z₅, Z₆, or Z₇ is a carbon to which the remainder of the molecule is     attached -   17. Z₃ and Z₅ are independently O, S, or N—R₁; Z₁, Z₂, Z₄, Z₆, Z₇     are independently CR₂, or N; Y₁ is N; Y₂, Y₃, Y₄ are C; any one of     Z₁, Z₃, Z₅, Z₁, or Z₇ is a carbon to which the remainder of the     molecule is attached. -   18. Z₃ and Z₅ are independently O, S, or N—R₁; Z₁, Z₂, Z₄, Z₆, Z₇     are independently CR₂; Y₁ is N; Y₂, Y₃, Y₄ are C; any one of Z₁, Z₃,     Z₅, Z₆, or Z₇ is a carbon to which the remainder of the molecule is     attached. -   19. Z₁ and Z₅ are independently O, S, or N—R₁; Z₂, Z₃, Z₄, Z₆, Z₇     are independently N, or CR₂; Y₁ is N; Y₂, Y₃, Y₄ are C; any one of     Z₂, Z₃, Z₄, Z, Z₇ is a carbon to which the remainder of the molecule     is attached. -   20. Z₁ and Z₅ are independently O, S, or N—R₁; Z₂, Z₃, Z₄, Z₆, Z₇     are independently CR₂; Y₁ is N; Y₂, Y₃, Y₄ are C; any one of Z₂, Z₃,     Z₄, Z₆, or Z₇ is a carbon to which the remainder of the molecule is     attached. -   21. Z₃ and Z₇ are independently O, S, or N—R₁; Z₁, Z₂, Z₄, Z₅, Z₆     are independently N, or CR₂; Y₁ is N; Y₂, Y₃, Y₄ are C; any one of     Z₁, Z₂, Z₄, Z₅, or Z₆ is a carbon to which the remainder of the     molecule is attached. -   22. Z₃ and Z₇ are independently O, S, N—R₁; Z₁, Z₂, Z₄, Z₅, Z₆ are     independently CR₂; Y₁ is N; Y₂, Y₃, Y₄ are C; any one of Z₁, Z₂, Z₄,     Z₅, or Z is a carbon to which the remainder of the molecule is     attached. -   23. Z₃ and Z₇ are independently O, S, N—R₁; Z₁, Z₂, Z₄, Z₅, Z₆ are     independently N, or CR₂; Y₂ is N; Y₁, Y₃, Y₄ are C; any one of Z₁,     Z₂, Z₄, Z₅, or Z₆ is a carbon to which the remainder of the molecule     is attached. -   24. Z₃ and Z₇ are independently O, S, or N—R₁; Z₁, Z₂, Z₄, Z₅, Z₆     are independently CR₂; Y₂ is N; Y₁, Y₃, Y₄ are C; any one of Z₁, Z₂,     Z₄, Z₅, or Z₆ is a carbon to which the remainder of the molecule is     attached. -   25. Z₃ and Z₅ are independently O, S, N—R₁; Z₁, Z₂, Z₄, Z₄, Z₇ are     independently N, or CR₂; Y₂ is N; Y₁, Y₃, Y₄ are C; any one of Z₁,     Z₂, Z₄, Z₆, or Z₇ is a carbon to which the remainder of the molecule     is attached. -   26. Z₃ and Z₅ are independently O, S, or N—R₁; Z₁, Z₂, Z₄, Z₆, Z₇     are independently CR₂; Y₂ is N; Y₁, Y₃, Y₄ are C; any one of Z₁, Z₂,     Z₄, Z₆, or Z₇ is a carbon to which the remainder of the molecule is     attached.

The preferred embodiment of formula 1-B is:

-   27. Z₁, Z₂, Z₃, Z₄, Z₅, Z₆ and Z₇ are independently CR₂.

The preferred embodiments of formula 2-A are:

-   28. Z₁ is CR₂; Z₂ is the carbon to which the remainder of the     molecule is attached; Z₃ is N or CR₂; Z₄ is O, S, CR₂ or N—R₁; Z₅,     Z₆, Z₇, Z₈ are independently CR₂ or N; Y₁ is N; Y₂, Y₃ and Y₄ are C. -   29. Z₂ is CR₂; Z₁ is carbon to which the remainder of the molecule     is attached; Z₃ is N or CR₂; Z₄ is O, S, CR₂ or N—R₁; Z₅, Z₆, Z₇, Z₈     are independently CR₂ or N; Y₁ is N; Y₂, Y₃ and Y₄ are C. -   30. Z₁ is N, Z₂ is carbon to which the remainder of the molecule is     attached; Z₃ is N or CR₂; Z₄ O, S, CR₂ or N—R₁; Z₅, Z₆, Z₇, Z₈ are     independently CR₂ or N; Y₁ is N; Y₂, Y₃ and Y₄ are C. -   31. Z₁, Z₂, Z₁ are independently CR₂ or N; Z₄ is O, S, CR₂ or N—R₁;     Z₅, Z₆, Z₇, Z₈ are independently CR₂ or N and one of Z₅, Z₆, Z₇, or     Z₈ is a carbon to which the remainder of the molecule is attached;     Y₁ is N; Y₂, Y₃ and Y₄ is C. -   32. Z₁ is CR₂ or N; Z₂ is CR₂: Z₃ is O, S or N—R₁; Z₄ is N or CR₂;     Z₅, Z₆, Z₇, Z₈ are independently CR₂; Y₁ is N, or C; Y₂, Y₃ and Y₄     are C. -   33. Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ are independently N or CR₂; Y₁,     Y₂, Y₃, Y₄ are C. -   34. Z₁, Z₂, Z₅, Z₆, Z₇, Z₈ are independently N or CR₂; Z₃ and Z₄ are     independently O, S, or N—R₁; Y₁, Y₂, Y₃, and Y₄ are C. -   35. Z₁, Z₂, and Z₃ are independently CR₂ or N; Z₄ is O, S, CR₂ or     N—R₁; Z₅, Z₆, Z₇, and Z₈ are independently CR₂ or N; Y, is N; Y₂, Y₃     and Y₄ are C. -   36. Z₁ is N; Z₂ is CR₂; Z₃ is the carbon atom to which remainder of     the molecule is attached; Z₄ is N; Z₅, Z₆, Z₇, Z₈ are independently     N or CR₂; Y₁, Y₂, Y₃, Y₄ are independently N or C.

The preferred embodiment of formula 2-B is:

-   37. Z₁ and Z₄ are independently CR₂ or N; Z₂ and Z₃ are CR₂; Z₅, Z₆,     Z₇ are independently CR₂ or N; Y₁ is C and Y₂ is N. -   38. Z₁ is O, S, or N—R₁; Z₂ is CR₂; Z₃ is CR₂, or N; Z₄ is O, S,     N—R₁, or CR₂: Z₅, Z₆, Z₇, Z₈ are independently N or CR₂; Y₁, Y₂, Y₃,     and Y₄ are C; one of Z₂, Z₃, Z₅, Z₆, Z₇, or Z₈ is a carbon atom to     which the remainder of the molecule is attached.

The preferred embodiments of formula 3-A are:

-   39. Z₁ is O, S, or N—R₁; Z₂ is N, or CR₂; Z₃ is CR₂; Z₅, Z₆, and Z₇     are independently N or CR₂; Z₄ and 48 are independently O, S, or     N—R₁; Y₁, Y₂, Y₃, and Y₄ are C and one of Z₂, Z₄, Z₄, or Z₇ is a     carbon atom to which the remainder of the molecule is attached. -   40. Z₃ is O, S, or N—R₁; Z₂ is N, CR₂; Z₁ is CR₂; Z₅, Z₆, and Z₇ are     independently N or CR₂; Z₄ and Z₈ are independently O, S, or N—R₁;     Y₁, Y₂, Y₃, and Y₄ are C and one of Z₂, Z₄, Z₆, or Z₇ is a carbon     atom to which the remainder of the molecule is attached.

The preferred embodiments of formula 3-B are:

-   41. Z₁ is O, S, or N—R₁; Z₂ is N or CR₂; Z₃ is CR₂; Z₄, Z₅, Z₆, Z₇,     and Z₈ are independently N or CR₂; Y₁, Y₂, Y₃, and Y₄ are C; and one     of Z₂, Z, Z₆, Z₇ is a carbon atom to which the remainder of the     molecule is attached. -   42. Z₁ is N or CR₂; Z₂ is CR₂; Z is O, S, N—R₁, or CR₂; Z₇ is CR₂ or     N; Z₆ and Z₈ are independently N or CR₂; Z₄ and Z₅ are CR₂ or N; Y₁,     Y₂, and Y₃ are C; Y₄ is N and one of Z₂, Z₄, Z₅, Z₆ is a carbon atom     to which the remainder of the molecule is attached. -   43. Z₁ is N, or CR₂; Z₂ is CR₂; Z₃ is O, S, N—R₁, or CR₂; Z₆ is CR₂     or N; Z₇, and Z₈ are independently N or CR₂; Z₄ and Z₅ are     independently CR₂ or N; Y₁, Y₂, Y₃ are C; Y₄ is N and one of Z₂, Z₄,     Z, Z₆ is a carbon atom to which the remainder of the molecule is     attached. -   44. Z₁ is O, S, or N—R₁; Z₂ is N, or CR₂; Z₃ is CR₂; Z₁, Z₇, and Z₈     are N; Z₄ and Z₅ are independently CR₂ or N; Y₁, Y₂, Y₄ are C; Y₃ is     N and one of Z₂, or Z₃ is a carbon atom to which the remainder of     the molecule is attached. -   45. Z₁ is N or CR₂; Z₂ is CR₂; Z₃ is O, S, N—R₁, or CR₂; Z₆, Z₇, and     Z₄ are N; Z₄, and Z₄ are independently CR₂ or N; Y₁, Y₂, Y₄ are C;     Y₃ is N and one of Z₁, Z₂ is a carbon atom to which the remainder of     the molecule is attached. -   46. Z₁ is N or CR₂; Z₂ is CR₂; Z₃ is O, S, N—R₁, or CR₂; Z₆, Z₇, and     Z₈ are N; Z₄ and Z₅ are independently CR₂ or N; Y₁, Y₂, Y₄ are C; Y₃     is N and one of Z₁; Z₂, is a carbon atom to which the remainder of     the molecule is attached. -   47. Z₁ is N; Z₂, Z₃, Z₄ and Z₅ are independently CR₂; Z₆, Z₇, and Z₈     are independently O, S, N, N—R₁, or CR₂; Y₂, Y₃, and Y₄ are C; Y₁ is     N; one of Z₂, Z₃, Z₆, Z₆, Z₇, Z₈ is a carbon atom to which the     remainder of the molecule is attached. -   48. Z₃ is N; Z₂ and Z₁ are independently CR₂; Z₄, and Z₅ are     independently CR₂; Z₆, Z₇, Z₈ are independently O, S, N, N—R₁, or     CR₂; Y₂, Y₃, and Y₁ are C; Y₄ is N; one of Z₂, Z₁, Z₆, Z₆, Z₇, Z₈ is     a carbon atom to which the remainder of the molecule is attached. -   49. Z₁ is N, or CR₂; Z₂ is CR₂; Z₃ is O, S, or N—R₁; Z₄ and Z₅ are     independently CR₂; Z₆, Z₇, Z₈ are independently O, S, N, N—R₁, or     CR₂; Y₁, Y₂, Y₃, and Y₄ are C; one of Z₁, Z₂, Z₃, Z₆, Z₇, Z is a     carbon atom to which the remainder of the molecule is attached.

The Preferred embodiments of formula 4-A

-   50. Z₁ and Z₃ are independently O, S, N—R₁, N, or CR₂; Z₂ is CR₂;     Z₄, Z₅, Z₆, Z₇, Z₈, Z₉, are independently CR₂; Y₁, Y₂, Y₃, Y₄, are     C. -   51. Z₁ and Z₃ are independently O, S, N—R₁, N, or CR₂; Z₂ is CR₂;     Z₄, and Z₉ are independently CR₂, or N; Z₅, Z₆, Z₇, Z₈ are     independently CR₂; Y₁, Y₂, Y₃, Y₄, are C; One of Z₁, Z₂, Z₃, Z₅, Z₆,     Z₇, Z₈ is a carbon atom to which the remainder of the molecule is     attached. -   52. Z₁ is S, O, or N—R₁; Z₂, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ are     independently CR₂; Z₉ is N; Y₁, Y₂, Y₃, Y₄, are C. -   53. Z₁, and Z₃ are independently O, S, N—R₁, N, or CR₂; Z₄, and Z₉,     are independently N or CR₂; Z₅, Z₆, Z₇, Z₈ are independently CR₂ or     N; Y₁, Y₂, Y₃, Y₄, are C; Z₂ is the carbon to which the remainder of     the molecule is attached. -   54. Z₁ is N; Z₂, Z₃, and Z₄ are independently CR₂; Z₅, Z₆, Z₇, Z₈     are independently N or CR₂; Z₉ is CR₂ or N; Y₁ is N; Y₂, Y₃, and Y₄,     are C; Z₂ or Z₃ is the carbon to which the remainder of the molecule     is attached. -   55. Z₃ is N; Z₁, Z₂, and Z₄ are independently CR₂; Z₅, Z₆, Z₇, and     Z₈ are independently CR₂, or N; Z₉ is CR₂, or N; Y₄ is N; Y₁, Y₂,     and Y₃ are C.

The Preferred embodiments of formula 4-B

-   56. Z₁ is N; Z₂, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈, and Z₉ are independently     CR₂; Y₁ is N; Y₂, Y₃, and Y₄ are C; one of Z₂, Z₃, Z₄, Z₇, Z₈, Z₄ is     the carbon atom to which the remainder of the molecule is attached. -   57. Z₃ is N; Z₁, Z₂, and Z₄ are independently CR₂; Z₅, Z₆, Z₇, Z₈,     and Z₉ are independently CR₂ or N; Y₁, Y₃, Y₄ are C; Y₂ is N. -   58. Z₁ is O, S, or N—R₁; Z₂, Z₃, and Z₄ are independently CR₂; Z₅ is     CR₂ or N; Z₆, Z₇, Z₈, and Z₉ are independently CR₂, or N; one of Z₄,     Z₇, Z₈, Z₄ is a carbon atom to which the remainder of the molecule     is attached. -   59. Z₁ and Z₃ are independently O, S, N—R₁, N, or CR₂; Z₄ is CR₂ or     N; Z₅ is CR₂; Z₆, Z₇, Z₈, and Z₉ are independently CR₂, or N; Y₁,     and Y₂ are independently C or N; Y₃ and Y₄ are C.

The Preferred embodiments of formula 4-C

-   60. Z₁ and Z₂ are independently N or CR₂; Z₃, Z₄, Z₅, Z₆, Z₇, and Z₄     are independently CR₂; Y₁ is C. -   61. Z₁, and Z₂ are independently CR₂; Z₃, Z₄, Z₅, Z₆, Z₇, and Z₈ are     independently N or CR₂; Y₁ is C. -   62. Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇, and Z₈ are independently N or CR₂;     Y₁ is C.

The Preferred embodiments of formula 5-A

-   63. Z₁ is O, S, or N—R₁; Z₂, and Z₃ are independently CR₂; Z₄ is O,     S, N—R₁, or CR₂; Y₁, and Y₂ are C; Y₄, and Y₃ are independently C,     or N; W₁, W₂, W₃ are independently CR₄R₄; t=1 or 2. -   64. Z₁ is O, S, or N—R₁; Z₂ and Z₃ are independently CR₂; Z₄ is O,     S, N—R₁, or CR₂; Y₁ and Y₂ are C; Y₄, and Y₃ are independently C, or     N; W₁, and W₃ are independently CR₄R₄; t=1 to 2; W₂ is O, S(O)r     (r=0-2), N—R₁ or CR₄R₄. -   65. Z₃ is N; Z₂ is CR₂; Z₁ is CR₂, or N; Z₄ is O, S, N—R₁, W₁, W₂,     and W₃ are independently CR₄R₄; t=1 to 3; Y₁, Y₃, and Y₄ are C; Y₂     is N; one of Z₁, Z₂ or Z₄ is the carbon atom to which the remainder     of the molecule is attached. -   66. Z₁ is N; Z₂ is CR₂; Z₃ is CR₂, or N; Z₄ is O, S, or N—R₁; W₁,     W₂, and W₃ are independently CR₄R₄; t=1 to 3; Y₂, Y₃, and Y₄ are C;     Y₁ is N; one of Z₂, Z₃, Z₄ is the carbon atom to which the remainder     of the molecule is attached. -   67. Z₃ is N; Z₂ is CR₂; Z₁ is CR₂, or N; Z is O, S, or N—R₁; Y₁, Y₃,     and Y₄ are C; Y₂ is N; W₁, W₂, and W₃ are independently CR₄R₄, O     S(O)r (r=0-2), or N—R₁ with the proviso that no S—S, S—O or O—O bond     formation can occur to form a saturated ring; t=1 to 3; one of Z₁,     Z₂ or Z₄ is the carbon atom to which the remainder of the molecule     is attached. -   68. Z₁ is N; Z₂ is CR₂; Z₃ is CR₂, or N; Z₄ is O, S, or N—R₁; Y₂,     Y₃, and Y₄ are C; Y₁ is N; W₁, W₂, and W₃ are independently CR₄R₄,     O, S═(O)_(r) (r=0-2); or N—R₁, with the proviso that no S—S, S═O or     O—O bond formation can occur to form a saturated ring; t=1-3; one of     Z₂, Z₃, Z is a carbon atom to which the remainder of the molecule is     attached. -   69. Z₁ is CR₂; Z₂ is the carbon atom to which the remainder of the     molecule is attached; Z₃ is N; Z₄ is O, S, or N—R₁; Y, is C; Y₂ is     N; Y₃, and Y₄ are C; W₁, W₂, and W₃ are independently CR₄R₄, O,     S═(O)r (r=0-2), or N—R₁ with the proviso that no S—S, S═O or O—O     bond formation can occur to form a saturated ring; t=1 to 3. -   70. Z₁ is the carbon atom to which the remainder of the molecule is     attached; Z₂ is CR₂; Z₃ is N; Z₄ is O, S, N—R₁; Y₁ is C; Y₂ is N;     Y₃, and Y₄ are C; W₁, W₂, and W₃ are independently CR₄R₄, O, S═(O)r     (r=0-2), or N—R₁ with the proviso that no S—S, S═O or O—O bond     formation can occur to form a saturated ring; t=1-3. -   71. Z₁, Z₂, and Z₃ are independently CR₂, or N; Z is CR₂; Y₁, Y₂ are     C; Y₃, Y₄ are N; W₁, W₂, and W₃ are independently CR₄R₄, O, S═(O)r     (r=0-2), or N—R₁ with the proviso that no S—S, S—O or O—O bond     formation can occur to form a saturated ring; t=1-3.

The Preferred embodiments of formula 5-B

-   72. Z₁, Z₂, Z₃, Z₄ are independently CR₂; Y₁, Y₂ are N; W₁, W₂ are     independently O, S, N—R₁, or CR₄R₄; t=1-2. -   73. Z₁, Z₂ are independently N, or CR₂; Z₃ is CR₂; Z₄ is O, S, or     N—R₁; W₁ and W₂ are independently O, S, N—R₁, CR₄R₄; t=1-2.

The preferred embodiments of formula 6-A are:

-   74. Z₁ is O, S, N—R₁; Z₂, Z₃, Z₄, Z₅ are independently CR₂; W₁, W₂,     W₃ are independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; Y₁, Y₂     are C; t=1-3; one of Z₂, Z₃ is the carbon atom to which the     remainder of the molecule is attached. -   75. Z₁ is O, S, or N—R₁; Z₃ is N, O, or S; Z₂, Z₄, Z₅ are     independently CR₂; W₁, W₂, W₃ are independently N—R₁, O, S═(O)_(r)     (r=0-2), or CR₄R₄; Y₁ and Y₂ are C; t=1-3; Z₂ is the carbon atom to     which the remainder of the molecule is attached. -   76. Z₁ is CR₂; Z₃ is N; Z₂, Z₄ and Z₅ are independently CR₂; W₁, W₂,     and W₃ are independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; Y₁ is     N; Y₂ is C; t=1-3; Z₁, or Z₂ is the carbon atom to which the     remainder of the molecule is attached. -   77. Z₁ is N; Z₂, Z₃, Z₄, Z₅ are independently CR₂; W₁, W₂, W₃ are     independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; Y₁ is C; Y₂ is     N; t=1-3; Z₂, or Z₃ is the carbon atom to which the remainder of the     molecule is attached. -   78. Z₁ is O, S, or N—R₁; Z₂ is N, O, or S; Z₃, Z₄, and Z₅ are     independently CR₂; W₁, W₂, and W₃ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; Y₁, and Y₂ are C; t=1-3; one of Z₃ is a     carbon atom to which the remainder of the molecule is attached. -   79. Z₁ is O, S, or N—R₁; Z₂, and Z₃ are independently CR₂; Z₄, and     Z₅ are independently CR₂, or N; W₁, W₂, and W₃ are independently     N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; Y₁, Y₂ are C; t=1-3; Z₂ or Z₃     is the carbon atom to which the remainder of the molecule is     attached. -   80. Z₁ is O, S, or N—R₁; Z₃ is N, O, or S; Z₂ is CR₂; Z₄, Z₅ are     independently CR₂, or N; W₁, W₂, W₃ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; Y₁, Y₂ are C; t=1-3; Z₂ is the carbon     atom to which the remainder of the molecule is attached. -   81. Z₁ is CR₂; Z₃ is N; Z₂ is CR₂; Z₄, Z₅ are independently N, or     CR₂; W₁, W₂, W₃ are independently N—R₁, O, S═(O)_(r) (r=0-2), or     CR₄R₄; Y₁ is N; Y₂ is C; t=1-3; Z₁ or Z₂ is the carbon atom to which     the remainder of the molecule is attached. -   82. Z₁ is N; Z₂, and Z₃ are independently CR₂; Z₄, Z₅ are     independently N or CR₂; W₁, W₂, W₃ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; Y₁ is C; Y₂ is N; t=1-3; Z₂ or Z₃ is     the carbon atom to which the remainder of the molecule is attached. -   83. Z₁ is O, S, or N—R₁; Z₂ is N, O, or S; Z₃ is CR₂; Z₄, and Z₅ are     independently N, or CR₂; W₁, W₂, W₃ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; Y₁, Y₂ are C; t=1-3; Z₃ is the carbon     atom to which the remainder of the molecule is attached.

The preferred embodiments of formula 6-B are:

-   84. Z₁ is O, S, or N—R₁; Z₂, Z₃, Z, and Z₅ are independently CR₂;     W₁, W₂, W₃ are independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄;     Y₁, Y₂, Y₃, and Y₄ are C; t=1-3; Z₂ or Z₃ is the carbon atom to     which the remainder of the molecule is attached. -   85. Z₁ is O, S, or N—R₁; Z₃ is N, O, or S; Z₂, Z₄, Z₅ are     independently CR₂; W₁, W₂, W₃ are independently N—R₁, O, S═(O)_(r)     (r=0-2), or CR₄R₄; Y₁, Y₂, Y₃, Y₄ are C; t=1-3; Z₂ is the carbon     atom to which the remainder of the molecule is attached. -   86. Z₁ is CR₂; Z₃ is N; Z₂, Z₄, and Z₅ are independently CR₂; W₁,     W₂, W₃ are independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; Y₃ is     N; Y₁, Y₂, Y₄ are C; t=1-3; Z₁, or Z₂ is the carbon atom to which     the remainder of the molecule is attached. -   87. Z₁ is N; Z₂, Z₃, Z₄, Z₅ are independently CR₂; W₁, W₂, W₃ are     independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; Y₁, Y₂, Y₃ are     C; Y₄ is N; t=1-3; Z₂ or Z₃ is the carbon atom to which the     remainder of the molecule is attached. -   88. Z₁ is O, S, or N—R₁; Z₂ is N, O, or S; Z₃, Z₄, and Z₅ are     independently CR₂; W₁, W₂, W₃ are independently N—R₁, O, S═(O)_(r)     (r=0-2), or CR₄R₄; Y₁, Y₂, Y₃, and Y₄ are C; t=1-3; Z₃ is the carbon     atom to which the remainder of the molecule is attached. -   89. Z₁ is O, S, or N—R₁; Z₂, and Z₃ are independently CR₂; Z₄, and     Z₅ are independently CR₂, or N; W₁, W₂, W₃ are independently N—R₁,     O, S═(O)_(r) (r=0-2), or CR₄R₄; Y₁, Y₂, Y₃, Y₄ are C; t=1-3; Z₂ or     Z₃ is the carbon atom to which the remainder of the molecule is     attached. -   90. Z₁ is O, S, or N—R₁; Z₃ is N, O, or S; Z₂ is CR₂; Z₄, and Z₅ are     independently CR₂ or N; W₁, W₂, W₃ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; Y₁, Y₂, Y₃, Y₄ are C; t=1-3; Z₂ is the     carbon atom to which the remainder of the molecule is attached. -   91. Z₁ is CR₂; Z₃ is N; Z₂ is CR₂; Z₁, and Z₅ are independently N,     CR₂; W₁, W₂, W₃ are independently N—R₁, O, S═(O)_(r) (r=0-2), or     CR₄R₄; Y₃ is N; Y₁, Y₂, Y₄ are C; t=1-3; Z₁ or Z₂ is the carbon atom     to which the remainder of the molecule is attached. -   92. Z₁ is N; Z₂, Z₃ are independently CR₂; Z₄, Z₅ are independently     N, or CR₂; W₁, W₂, W₃ are independently N—R₁, O, S═(O)_(r) (r=0-2),     or CR₄R₄; Y₁, Y₂, Y₃ are C; Y₄ is N; t=1-3; Z₂, or Z₃ is the carbon     atom to which the remainder of the molecule is attached. -   93. Z₁ is O, S, or N—R₁; Z₂ is N, O, or S; Z₃ is CR₂; Z₄, Z₅ are     independently N, or CR₂; W₁, W₂, W₃ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; Y₁, Y₂, Y₃, Y₄ are C; t=1-3; Z₃ is the     carbon atom to which the remainder of the molecule is attached.

The preferred embodiments of formula 6-C are:

-   94. Z₁, Z₃, Z₄, and Z₅ are independently N or CR₂; Z₂ is O, S, or     N—R₁; Y₁, Y₂ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=1-2. -   95. Z₁, Z₃, Z₄, Z₅ are independently CR₂; Z₂ is O, S, or N—R₁; Y₁,     Y₂ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r) (r=0-2), or     CR₄R₄; t=1-2. -   96. Z₁, Z₃, Z₅ are independently CR₂; Z₂ is O, S, N—R₁; Z₄ is N; Y₁,     Y₂ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r) (r=0-2), or     CR₄R₄; t=1-2. -   97. Z₁, Z₂, Z₃, Z₄, and Z₅ are independently CR₂; Y₁ is C; Y₂ is N;     W₁, W₂ are independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄;     t=1-2. -   98. Z₁, Z₂, Z₃, Z₅ are independently CR₂; Z₄ is N; Y₁ is C; Y₂ is N;     W₁, W₂ are independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄;     t=1-2.

The preferred embodiments of formula 7-A are:

-   99. Z₃, Z₆ are independently O, S, or N—R₁; Z₁, Z₂, Z₄, Z₅ are     independently CR₂; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), or CR₄R₄; t=1-2. -   100. Z₃, Z₆ are independently O, S, or N—R₁; Z₁, Z₄ are N; Z₂, Z₅     are independently CR₂; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), or CR₄R₄; t=1-2; Z₂ or Z₁ is the carbon atom to which the     remainder of the molecule is attached. -   101. Z₁, Z₄ are independently O, S, or N—R₁; Z₂, Z₃, Z₅, Z₆ are     independently CR₂; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), or CR₄R₄; t=1-2. -   102. Z₁, Z₄ are independently O, S, or N—R₁; Z₃, Z₆ are N; Z₂, Z₅     are independently CR₂; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), or CR₄R₄; t=1-2; Z₂ or Z₅ is the carbon atom to which the     remainder of the molecule is attached. -   103. Z₂, Z₅ are independently O, S, or N—R₁; Z₁, Z₃, Z₄, Z₆ are     independently CR₂; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), or CR₄R₄; t=1-2. -   104. Z₂, Z₅ are independently O, S, N—R₁; Z₁, Z_(3.14), Z₆ are     independently CR₂, N, S; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=1-2; One of Z₁, Z₃, Z₄, Z₁ is the carbon atom to     which the remainder of the molecule is attached. -   105. Z₁ is CR₂, N; Z₂ is CR₂; Z₃ is N; 14, Z₅ are independently CR₂;     Z₆ is N; Y₁, Y₃ are independently CR₂; Y₂, Y₄ are N; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of     Z₁, Z₂, Z₄, Z₅ is the carbon atom to which the remainder of the     molecule is attached. -   106. Z₁ is CR₂, or N; Z₂ is CR₂; Z₃ is O, S, N—R₁; Z₄, Z₅ are     independently CR₂; Z₁ is N; Y₁, Y₄, Y₃ are independently CR₂; Y₂ is     N; W₁, W₂ are independently N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄;     t=1-2; One of Z₁, Z₂, Z₄, Z₁ is the carbon atom to which the     remainder of the molecule is attached. -   107. Z₁ is CR₂, or N; Z₂ is CR₂; Z₃ is N; Z₄, Z₅, Z₆ are     independently N, or CR₂; Y₁, and Y₃ are N; Y₂, Y₄ are independently     CR₂; W₁, W₂ are independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄;     t=1-2; One of Z₁, Z₂, Z₄, Z₅, Z₆ is the carbon atom to which the     remainder of the molecule is attached.

The preferred embodiments of formula 7-B are:

-   108. Z₁, Z₂, Z₄, Z₅, Z₆ are independently CR₂; Z₃ is O, S, or N—R₁;     Y₁, Y₂, Y₄ are C; Y₃ is N; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2. -   109. Z₁, Z₂, Z₄, Z₅, Z₆ are independently CR₂ or N; Z₃ is O, S, or     N—R₁; Y₁, Y₂, Y₄ are C; Y₃ is N; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z₄, Z₅, Z₆ is the     carbon atom to which the remainder of the molecule is attached. -   110. Z₁, Z₂, Z₃, Z₄, Z₆ are independently CR₂; Z₄ is O, S, or N—R₁;     Y₁, Y₂, Y₃ are C; Y₄ is N; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z₃, Z₅, Z₆ is the     carbon atom to which the remainder of the molecule is attached. -   111. Z₁, Z₂, Z₃, Z₅, Z₆ are independently CR₂ or N; Z₄ is O, S, or     N—R₁; Y₁, Y₂, Y₃ are C; Y₄ is N; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z₃, Z₅, Z₆ is the     carbon atom to which the remainder of the molecule is attached. -   112. Z₁, Z₂, Z₃, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₃ are N; Y₂,     Y₄ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r) (r=0-2), or     CR₄R₄; t=1-2; One of Z₁, Z₂, Z₃, Z₄, Z₅, Z₆ is the carbon atom to     which the remainder of the molecule is attached. -   113. Z₁, Z₂, Z₃, Z₄, Z₅, Z₆ are independently CR₂ or N; Y₁, Y₃ are     N; Y₂, Y₄ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z Z₄, Z₅, Z₆ is the carbon     atom to which the remainder of the molecule is attached. -   114. Z₁, Z₃, Z₄, Z₅, Z₆ are independently CR₂; Z₂ is O, S, or N—R₁;     Y₁, Y₂, Y₄ is C; Y₃ is N; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₃, Z₄, Z₅, Z₆ is the     carbon atom to which the remainder of the molecule is attached. -   115. Z₁, Z₃, Z₄, Z₅, Z₆ are independently CR₂, or N; Z₂ is O, S, or     N—R₁; Y₁, Y₂, Y₄ are C; Y₃═N; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₃, Z₄, Z₅, Z₆ is the     carbon atom to which the remainder of the molecule is attached. -   116. Z₁, Z₂, Z₄, Z₆ are independently CR₂; Z₃, Z₅ are independently     O, S, or N—R₁; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁,     O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z₄, Z₆ is the     carbon atom to which the remainder of the molecule is attached. -   117. Z₁, Z₂, Z₄, Z₆ are independently CR₂, or N; Z₃, Z₅ are     independently O, S, or N—R₁; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of     Z₁, Z₂, Z₄, Z₆ is the carbon atom to which the remainder of the     molecule is attached. -   118. Z₁, Z₂, Z₄, Z₅ are independently CR₂; Z₃, Z₆ are independently     O, S, or N—R₁; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁,     O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z₄, Z₅ is the     carbon atom to which the remainder of the molecule is attached. -   119. Z₁, Z₂, Z₄, Z₅ are independently CR₂, or N; Z₃, Z₆ are     independently O, S, or N—R₁; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of     Z₁, Z₂, Z₄, Z₅ is the carbon atom to which the remainder of the     molecule is attached. -   120. Z₁, Z₂, Z₅, Z₆ are independently CR₂; Z₃, Z₄ are independently     O, S, or N—R₁; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁,     O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z₅, Z₆ is the     carbon atom to which the remainder of the molecule is attached. -   121. Z₁, Z₂, Z₅, Z₆ are independently CR₂ or N; Z₃, Z₄ are     independently O, S, or N—R₁; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of     Z₁, Z₂, Z₅, Z₆ is the carbon atom to which the remainder of the     molecule is attached. -   122. Z₁, Z₂, Z₄, Z₅ are independently CR₂; Z₃, Z₆ are independently     O, S, or N—R₁; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁,     O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z₅, Z₆ is the     carbon atom to which the remainder of the molecule is attached. -   123. Z₁, Z₂, Z₄, Z₅ are independently CR₂, or N; Z₃, Z₆ are     independently O, S, or N—R₁; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of     Z₁, Z₂, Z₅, Z₆ is the carbon atom to which the remainder of the     molecule is attached. -   124. Z₁, Z₂, Z₃, Z₄, Z₆ are independently CR₂; Z₅ is O, S, or N—R₁;     Y₁ is N; Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z₃, Z₄, Z₆ is the     carbon atom to which the remainder of the molecule is attached. -   125. Z₁, Z₂, Z₃, Z₄, Z₆ are independently CR₂, or N; Z₅ is O, S, or     N—R₁; Y₁ is N; Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z₃, Z₄, Z₆ is the     carbon atom to which the remainder of the molecule is attached. -   126. Z₁, Z₃, Z₄, Z₆ are independently CR₂; Z₂, Z₅ are independently     O, S, or N—R₁;     -   Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,         S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₃, Z₄, Z₆ is the         carbon atom to which the remainder of the molecule is attached. -   127. Z₁, Z₃, Z₄, Z₆ are independently CR₂ or N; Z₂, Z₅ are     independently O, S, or N—R₁; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of     Z₁, Z₃, Z₄, Z₆ is the carbon atom to which the remainder of the     molecule is attached.

The preferred embodiments of formula 8-A are:

-   128. Z₁ is O, S, or N—R₁; Z₂, Z₄, Z₅, Z₆, Z₇ are independently CR₂;     Z₃ is CR₂, or N; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently     N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₂, Z₃, Z₄, Z₆     is the carbon atom to which the remainder of the molecule is     attached. -   129. Z₁ is O, S, or N—R₁; Z₂, Z₄, Z₅, Z₆, Z₇ are independently CR₂;     Z₃ is CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ is     the carbon atom to which the remainder of the molecule is attached. -   130. Z₁ is O, S, or N—R₁; Z₂, Z₄, Z₅, Z₆, Z₇ are independently CR₂;     Z₃ is N; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₂, Z₄, Z₅, Z₆, Z₇ is the     carbon atom to which the remainder of the molecule is attached. -   131. Z₁ is O, S, or N—R₁; Z₃, Z₄, Z₅, Z₆, Z₇ are independently CR₂;     Z₂ is CR₂, or N; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently     N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₂, Z₃, Z₄, Z₅,     Z₆, Z₇ is the carbon atom to which the remainder of the molecule is     attached. -   132. Z₁ is O, S, or N—R₁; Z₃, Z₄, Z₅, Z₆, Z₇ are independently CR₂;     Z₂ is N; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₃, Z₄, Z₅, Z₆, Z₇ is the     carbon atom to which the remainder of the molecule is attached. -   133. Z₁ is O, S, or N—R₁; Z₃, Z₄, Z₅, Z₆, Z₇ are independently CR₂;     Z₂ is CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ is     the carbon atom to which the remainder of the molecule is attached. -   134. Z₁ is O, S, or N—R₁; Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ are independently N     or CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ is     the carbon atom to which the remainder of the molecule is attached. -   135. Z₁ is O, S, or N—R₁; Z₂ is CR₂; Z₄, Z₅, Z₆, Z₇ are     independently N or CR₂; Z₃ is CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of     Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ is the carbon atom to which the remainder of     the molecule is attached. -   136. Z₁ is O, S, or N—R₁; Z₂ is CR₂; Z₄, Z₅, Z₆, and Z₇ are     independently N or CR₂; Z₃ is N; Y₁, Y₂, Y₃, Y₄ are C; W₁ and W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of     Z₂, Z₄, Z₅, Z₇ is the carbon atom to which the remainder of the     molecule is attached. -   137. Z₁ is O, S, or N—R₁; Z₄, Z₅, Z₆, and Z₇ are independently N or     CR₂; Z₂ and Z₃ are independently CR₂ or N; Y₁, Y₂, Y₃, Y₄ are C; W₁     and W₂ are independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄;     t=1-2; One of Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ is the carbon atom to which the     remainder of the molecule is attached. -   138. Z₁ is O, S, or N—R₁; Z₃ is CR₂; Z₄, Z₅, Z₆, and Z₇ are     independently N or CR₂; Z₂ is N; Y₁, Y₂, Y₃, and Y₄ are C; W₁ and W₂     are independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One     of Z₃, Z₄, Z₅, Z₆, Z₇ is the carbon atom to which the remainder of     the molecule is attached. -   139. Z₁ is O, S, N—R₁; Z₄, Z₅, Z₆, and Z₇ are independently N or     CR₂; Z₂ and Z₃ are independently CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁ and     W₂ are independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2;     One of Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ is the carbon atom to which the     remainder of the molecule is attached. -   140. Z₃ is O, S, or N—R₁; Z₂, Z₄, Z₅, Z₆, and Z₇ are independently     CR₂; Z₁ is CR₂ or N; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently     N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z₄, Z₅,     Z₆, Z₇ is the carbon atom to which the remainder of the molecule is     attached. -   141. Z₃ is O, S, or N—R₁; Z₁, Z₂, Z₃, Z₄, Z₆, Z₇ are independently     CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z₄, Z₅, Z₆, Z₇ is     the carbon atom to which the remainder of the molecule is attached. -   142. Z₃ is O, S, or N—R₁; Z₂, Z₄ Z, Z₆, and Z₇ are independently     CR₂; Z₁ is N; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁,     O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z₄, Z, Z₆, Z₇     is the carbon atom to which the remainder of the molecule is     attached. -   143. Z₃ is O, S, or N—R₁; Z₁, Z₄, Z₅, Z₆, Z₇ are independently CR₂;     Z₂ is CR₂ or N; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁,     O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z Z₅, Z₆, Z₇     is the carbon atom to which the remainder of the molecule is     attached. -   144. Z₃ is O, S, or N—R₁; Z₁, Z₄, Z₅, Z₆, Z₇ are independently CR₂;     Z₂ is N; Y₁, Y₂, Y₃, Y₄ are C; W₁ and W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₄, Z₅, Z₄, Z₆, Z₇ is     the carbon atom to which the remainder of the molecule is attached. -   145. Z₃ is O, S, or N—R₁; Z₁, Z₂, Z₄, Z₅, Z₆, Z₇ are independently     CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁ and W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z₄, Z, Z₆, Z₇ is     the carbon atom to which the remainder of the molecule is attached. -   146. Z₃ is O, S, or N—R₁; Z₂, Z₄, Z₅, Z₆, Z₇ are independently N or     CR₂; Z₁ is CR₂, or N; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently     N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄; t=1-2; One of Z₁, Z₂, Z₄, Z₅, Z₆,     Z₇ is the carbon atom to which the remainder of the molecule is     attached. -   147. Z₃ is O, S, or N—R₁; Z₂ is CR₂; Z₄, Z₅, Z₆, Z₇ are     independently N or CR₂; Z₁ is CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁ and W₂     are independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One     of Z₁, Z₂, Z₄, Z₅, Z₆, Z₇ is the carbon atom to which the remainder     of the molecule is attached. -   148. Z₃ is O, S, or N—R₁; Z₂ is CR₂; Z₄, Z₅, Z₆, and Z₇ are     independently N or CR₂; Z₁ is N; Y₁, Y₂, Y₃, Y₄ are C; W₁ and W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of     Z₂, Z₄, Z₅, Z₆, Z₇ is the carbon atom to which the remainder of the     molecule is attached. -   149. Z₃ is O, S, or N—R₁; Z₄, Z₅, Z₆, and Z₇ are independently N or     CR₂; Z₂ and Z₁ are independently CR₂ or N; Y₁, Y₂, Y₃, Y₄ are C; W₁     and W₂ are independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄;     t=1-2; One of Z₁, Z₂, Z₄, Z₅, Z₆, Z₇ is the carbon atom to which the     remainder of the molecule is attached. -   150. Z₃ is O, S, N—R₁; Z₁ is CR₂; Z₄, Z₅, Z₆, Z₇ are independently N     or CR₂; Z₂ is N; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently     N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄; t=1-2; One of Z₁, Z₄, Z₅, Z₆, and     Z₇ is the carbon atom to which the remainder of the molecule is     attached. -   151. Z₃ is O, S, N—R₁; Z₄, Z₅, Z₆, and Z₇ are independently N or     CR₂; Z₁, and Z₂ are independently CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁ and     W₂ are independently N—R₁, O, S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2;     One of Z₁, Z₂, Z₄, Z₅, Z₆, and Z₇ is the carbon atom to which the     remainder of the molecule is attached. -   152. Z₁, Z₂, Z₃, Z₄, Z, 4, and Z₇ are independently CR₂; Y₄ is N;     Y₁, Y₂, Y₃ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ is the     carbon atom to which the remainder of the molecule is attached. -   153. Z₁ is N; Z₂, Z₃, Z₄, Z₅, Z₆, and Z₇ are independently CR₂; Y₄     is N; Y₁, Y₂, Y₃ are C; W₁ and W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), or CR₄R₄; t=1-2; One of Z₂, Z₃, Z₄, Z₅, Z₆, and     Z₇ is the carbon atom to which the remainder of the molecule is     attached. -   154. Z₂ is N; Z₁, Z₃, Z₄, Z₅, Z₆, Z₇ are independently CR₂; Y₄ is N;     Y₁, Y₂, Y₃ are C; W₁ and W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=1-2; One of Z₁, Z₃, Z₄, Z₅, Z₆, and Z₇ is the     carbon atom to which the remainder of the molecule is attached. -   155. Z₃ is N; Z₁, Z₂, Z₄, Z₅, Z₆, and Z₇ are independently CR₂; Y₄     is N; Y₁, Y₂, Y₃ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), or CR₄R₄; t=1-2; One of Z₁, Z₂, Z₄, Z₅, Z₆, and Z₇ is the     carbon atom to which the remainder of the molecule is attached. -   156. Z₁ and Z₂ are N; Z₃, Z₄, Z₅, Z₆, Z₇ are independently CR₂; Y₄     is N; Y₁, Y₂, Y₃ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=1-2; One of Z₃, Z₄, Z₅, Z₆, Z₇ is the carbon atom     to which the remainder of the molecule is attached. -   157. Z₁, Z₃ are N; Z₂, Z₄, Z₅, Z₆, Z₇ are independently CR₂; Y₄ is     N; Y₁, Y₂ Y₃ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=1-2; One of Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ is the     carbon atom to which the remainder of the molecule is attached. -   158. Z₁, Z₂, Z₃ are N; Z₄, Z₅, Z₆, Z₇ are independently CR₂; Y₄ is     N; Y₁, Y₂, Y₃ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=1-2; One of Z₄, Z₅, Z₆, Z₇ is the carbon atom to     which the remainder of the molecule is attached. -   159. Z₁, Z₂, Z₃ are independently CR₂; Z₄, Z₅, Z₆, Z₇ are     independently N, CR₂; Y₄ is N; Y₁, Y₂, Y₃ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄; t=1-2; One of Z₁,     Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ is the carbon atom to which the remainder of     the molecule is attached. -   160. Z₁ is N; Z₂, Z₃ are independently CR₂; Z₄, Z₅, Z₆, Z₇ are     independently N, CR₂;     -   Y₄ is N; Y₁, Y₂, Y₃ are C; W₁, W₂ are independently N—R₁, O,         S═(O)_(r) (r=0-2), CR₄R₄; t=1-2; One of Z₂, Z₃, Z₄, Z₅, Z₆, Z₇         is the carbon atom to which the remainder of the molecule is         attached. -   161. Z₂ is N; Z₁, Z₃ are independently CR₂; Z₄, Z₅, Z₆, Z₇ are     independently N, CR₂; Y₄ is N; Y₁, Y₂, Y₃ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄; t=1-2; One of Z₁,     Z₃, Z₄, Z₅, Z₆, Z₇ is the carbon atom to which the remainder of the     molecule is attached. -   162. Z₃ is N; Z₁, Z₂ are independently CR₂; Z₄, Z₅, Z₆, Z₇ are     independently N, CR₂; Y₄ is N; Y₁, Y₂, Y₃ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄; t=1-2; One of Z₁,     Z₂, Z₄, Z₁, Z₆, Z₇ is the carbon atom to which the remainder of the     molecule is attached. -   163. Z₁, Z₂ are N; Z₃ are independently CR₂; Z₄, Z₅, Z₆, Z₇ are     independently N, CR₂; Y₄ is N; Y₁, Y₂, Y₃ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄; t=1-2; One of Z₃,     Z₄, Z₅, Z₆, Z₇ is the carbon atom to which the remainder of the     molecule is attached. -   164. Z₁, Z₃ are N; Z₂ are independently CR₂; Z₄, Z₅, Z₆, Z₇ are     independently N, CR₂; Y₄ is N; Y₁, Y₂, Y₃ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄; t=1-2; One of Z₁,     Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ is the carbon atom to which the remainder of     the molecule is attached. -   165. Z₁, Z₂, Z₃ are N; Z₄, Z₅, Z₆, Z₇ are independently N, CR₂; Y₄     is N; Y₁, Y₂, Y₃ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=1-2; One of Z₄, Z₅, Z₆, Z₇ is the carbon atom to     which the remainder of the molecule is attached.

The preferred embodiments of formula 8-B are:

-   166. Z₁ is O, S, N—R₁; Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ are independently N,     CR₂; Y₁, Y₂ Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ is     the carbon atom to which the remainder of the molecule is attached. -   167. Z₁ is O, S, N—R₁; Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ are CH₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; One of Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ is the carbon atom to     which the remainder of the molecule is attached. -   168. Z₁ is O, S, N—R₁; Z₂ is N; Z₃, Z₄, Z₅, Z₆, Z₇ are independently     N, CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₃, Z₄, Z₅, Z₆, Z₇ is the     carbon atom to which the remainder of the molecule is attached. -   169. Z₁ is O, S, N—R₁; Z₂, Z₃ are N; Z₄, Z₅, Z₆, Z₇ are     independently N, CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently     N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of 4, Z₅, Z₆, Z₇ is     the carbon atom to which the remainder of the molecule is attached. -   170. Z₁ is O, S, N—R₁; Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ are independently N,     CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₃ is N; Z₂, Z₄, Z₅, Z₆, Z₇     is the carbon atom to which the remainder of the molecule is     attached. -   171. Z₂ is O, S, N—R₁; Z₁, Z₃, Z₄, Z₅, Z₆, Z₇ are independently N,     CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₁, Z₃, Z₄, Z₅, Z₆, Z₇ is     the carbon atom to which the remainder of the molecule is attached. -   172. Z₂ is O, S, N—R₁; Z₁, Z₃, Z₄, Z₅, Z₆, Z₇ are independently CR₂;     Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=0-2; One of Z₁, Z₃, Z₄, Z₅, Z₆, Z₇ is the carbon     atom to which the remainder of the molecule is attached. -   173. Z₂ is O, S, N—R₁; Z₁ is N; Z₃ is CR₂; Z₄, Z₅, Z₆, Z₇ are     independently N, CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently     N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₃, Z₄, Z, 4, Z₇ is     the carbon atom to which the remainder of the molecule is attached. -   174. Z₂ is O, S, N—R₁; Z₁, Z₃ are N; 4, Z₅, Z₆, Z₇ are independently     N, CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₄, Z₅, Z₆, Z₇ is the carbon     atom to which the remainder of the molecule is attached. -   175. Z₃ is O, S, N—R₁; Z₁, Z₂, Z₄, Z₅, Z₆, Z₇ are independently N,     CR₂; Y₁, Y₂ Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₁, Z₂, Z₄, Z, 4, Z₇ is the     carbon atom to which the remainder of the molecule is attached. -   176. Z₃ is O, S, N—R₁; Z₁, Z₂, Z₄, Z₅, Z₆, Z₇ are independently CR₂;     Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=0-2; One of Z₁, Z₂, Z₄, Z₅, Z₆, Z₇ is the carbon     atom to which the remainder of the molecule is attached. -   177. Z₃ is O, S, N—R₁; Z₁ is N; Z₂ is CR₂; Z₄, Z₄, Z₆, Z₇ are     independently N, CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently     N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₂, Z₄, Z₅, Z₆, Z₇     is the carbon atom to which the remainder of the molecule is     attached. -   178. Z₃ is O, S, N—R₁; Z₁, Z₂ is N; Z₄, Z, Z₆, Z₇ are independently     N, CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₄, Z₅, Z₆, Z₇ is the carbon     atom to which the remainder of the molecule is attached. -   179. Z₁, Z₂, Z₃, Z₄, Z₄, Z₆, Z₇ are independently N, CR₂; Y₁ is N;     Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=0-2; One of Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ is the     carbon atom to which the remainder of the molecule is attached. -   180. Z₁ is N; Z₂, Z₃ are independently CR₂; Z₄, Z₅, Z₆, Z₇ are     independently N, CR₂; Y₁ is N; Y₂, Y₃, Y₄ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₂,     Z₃, Z₄, Z₅, Z₆, Z₇ is the carbon atom to which the remainder of the     molecule is attached. -   181. Z₁, Z₂ are N; Z₃ is CR₂; Z₄, Z₅, Z₆, Z₇ are independently N,     CR₂; Y₁ is N; Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₃, Z₄, Z₅, Z₆, Z₇ is the     carbon atom to which the remainder of the molecule is attached. -   182. Z₁, Z₂, Z₃ are N; 4, Z₅, Z₆, Z₇ are independently N, CR₂; Y₁ is     N; Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=0-2; One of Z₄, Z₅, Z₆, Z₇ is the carbon atom to     which the remainder of the molecule is attached. -   183. Z₂ is N; Z₁, Z₃ are independently CR₂; Z₄, Z₅, Z₆, Z₇ are     independently N, CR₂; Y₁ is N; Y₂, Y₃, Y₄ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₁,     Z₃, Z₄, Z₅, Z₆, Z₇ is the carbon atom to which the remainder of the     molecule is attached. -   184. Z₂, Z₃ are N; Z₁ is CR₂; Z₄, Z₅, Z₆, Z₇ are independently N,     CR₂; Y₁ is N; Y₂, Y₃, Y₄ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₁, Z₄, Z₅, Z₆, Z₇ is the     carbon atom to which the remainder of the molecule is attached. -   185. Z₃ is N; Z₁, Z₂ are independently CR₂; Z₄, Z₅, Z₆, Z₇ are     independently N, CR₂; Y₁ is N; Y₂, Y₃, Y₄ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₁,     Z₂, Z₄, Z₅, Z₆, Z₇ is the carbon atom to which the remainder of the     molecule is attached. -   186. Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ are independently N, CR₂; Y₄ is N;     Y₂, Y₃, Y₁ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=0-2; One of Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ is the     carbon atom to which the remainder of the molecule is attached. -   187. Z₁ is N; Z₂, Z₃ are independently CR₂; Z₄, Z₅, Z₆, Z₇ are     independently N, CR₂; Y₄ is N; Y₂, Y₃, Y₁ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₂,     Z₃, Z₄, Z₅, Z₆, Z₇ is the carbon atom to which the remainder of the     molecule is attached. -   188. Z₁, Z₂ are N; Z₃ is CR₂; Z₄, Z₅, Z₆, Z₇ are independently N,     CR₂; Y₄ is N; Y₂, Y₃, Y₁ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₃, Z₄, Z₅, Z₆, Z₇ is the     carbon atom to which the remainder of the molecule is attached. -   189. Z₁, Z₂, Z₃ are N; 4, Z₅, Z₆, Z₇ are independently N, CR₂; Y₄ is     N; Y₂, Y₃, Y₁ are C; W₁, W₂ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=0-2; One of Z₄, Z₅, Z₆, Z₇ is the carbon atom to     which the remainder of the molecule is attached. -   190. Z₂ is N; Z₁, Z₃ are independently CR₂; Z₄, Z₅, Z₆, Z₇ are     independently N, CR₂; Y₄ is N; Y₂, Y₃, Y₁ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₁,     Z₃, Z₄, Z₅, Z₅, Z₆, Z₇ is the carbon atom to which the remainder of     the molecule is attached. -   191. Z₂, Z₃ are N; Z₁ is CR₂; Z₄, Z₅, Z₆, Z₇ are independently N,     CR₂; Y₄ is N; Y₂, Y₃, Y₁ are C; W₁, W₂ are independently N—R₁, O,     S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₁, Z₄, Z, Z₆, Z is the     carbon atom to which the remainder of the molecule is attached. -   192. Z₃ is N; Z₁, Z₂ are independently CR₂; Z₄, Z₅, Z₆, Z₇ are     independently N, CR₂; Y₄ is N; Y₂, Y₃, Y₁ are C; W₁, W₂ are     independently N—R₁, O, S═(O)_(r) (r=0-2), CR₄R₄; t=0-2; One of Z₁,     Z₂, Z₄, Z₅, Z₆, Z₇ is the carbon atom to which the remainder of the     molecule is attached.

The preferred embodiments of formula 9-A are:

-   193. Z₁ is O, S, N—R₁; Z₂, Z₃ are independently CR₂; Y₁, Y₄ are C;     Y₂, Y₃ are independently N, C, CH (in between a double bond might be     present); W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=0-2; u=1-3; One of Z₂, Z₃ is the carbon atom to     which the remainder of the molecule is attached. -   194. Z₁ is O, S, N—R₁; Z₂ is N; Z₃ is CR₂; Y₁, Y₄ are C; Y₂, Y₃ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₃ is the carbon atom to which the remainder of     the molecule is attached. -   195. Z₁ is O, S, N—R₁; Z₃ is N Z₂ is CR₂; Y₁, Y₄ are C; Y₂, Y₃ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₂ is the carbon atom to which the remainder of     the molecule is attached. -   196. Z₂ is O, S, N—R₁; Z₁, Z₃ are independently CR₂; Y₁, Y₄ are C;     Y₂, Y₃ are independently C, CH, N (in between a double bond might be     present); W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=0-2; u=1-3; One of Z₂, Z₃ is the carbon atom to     which the remainder of the molecule is attached. -   197. Z₂ is O, S, N—R₁; Z₁ is N; Z₃ is CR₂; Y₁, Y₄ are C; Y₂, Y₃ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₃ is the carbon atom to which the remainder of     the molecule is attached. -   198. Z₂ is O, S, N—R₁; Z₃ is N Z₁ is CR₂; Y₁, Y₄ are C; Y₂, Y₃ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₁ is the carbon atom to which the remainder of     the molecule is attached. -   199. Z₃ is O, S, N—R₁; Z₁, Z₂ are independently CR₂; Y₁, Y₄ are C;     Y₂, Y₃ are independently C, CH, N (in between a double bond might be     present); W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=0-2; u=1-3; One of Z₁, Z₂ is the carbon atom to     which the remainder of the molecule is attached. -   200. Z₃ is O, S, N—R₁; Z₁ is N; Z₂ is CR₂; Y₁, Y₄ are C; Y₂, Y₃ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₂ is the carbon atom to which the remainder of     the molecule is attached. -   201. Z₃ is O, S, N—R₁; Z₁ is CH₂; Z₂ is N; Y₁, Y₄ are C; Y₂, Y₃ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₁ is the carbon atom to which the remainder of     the molecule is attached. -   202. Z₁, Z₂, Z₃ are independently CR₂; Y₁ is N; Y₄ is C; Y₂, Y₃ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; One of Z₁, Z₂, Z₃ is the carbon atom to which     the remainder of the molecule is attached. -   203. Z₁ is N; Z₂, Z₃ are independently CR₂; Y₁ is N; Y₄ is C; Y₂, Y₃     are independently C, CH. N (in between a double bond might be     present); W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=0-2; u=1-3; One of Z₂, Z₃ is the carbon atom to     which the remainder of the molecule is attached. -   204. Z₁, Z₂ is N; Z₃ is CR₂; Y₁ is N; Y₄ is C; Y₂, Y₃ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₃ is the carbon atom to which the remainder of     the molecule is attached. -   205. Z₁, Z₃ are N; Z₂ is CR₂; Y₁ is N; Y₄ is C; Y₂, Y₃ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₂ is the carbon atom to which the remainder of     the molecule is attached. -   206. Z₁, Z₂, Z₃ are independently CR₂; Y₄ is N; Y₁ is C; Y₂, Y₃ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; One of Z₁, Z₂, Z₃ is the carbon atom to which     the remainder of the molecule is attached. -   207. Z₁ is N; Z₂, Z₃ are independently CR₂; Y₄ is N; Y₁ is C; Y₂, Y₃     are independently C, CH. N (in between a double bond might be     present); W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=0-2; u=1-3; One of Z₂, Z₃ is the carbon atom to     which the remainder of the molecule is attached. -   208. Z₁, Z₂ are N; Z₃ is CR₂; Y₄ is N; Y₁ is C; Y₂, Y₃ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₃ is the carbon atom to which the remainder of     the molecule is attached. -   209. Z₁, Z₃ are N; Z₂ is CR₂; Y₄ is N; Y₁ is C; Y₂, Y₃ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₂ is the carbon atom to which the remainder of     the molecule is attached.

The preferred embodiments of formula 9-B:

-   210. Z₁ is O, S, N—R₁; Z₂, Z₃ are independently CR₂; Y₁, Y₂ are C;     Y₃, Y₄ are independently N, C, CH (in between a double bond might be     present); W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=0-2; u=1-3; One of Z₂, Z₃ is the carbon atom to     which the remainder of the molecule is attached. -   211. Z₁ is O, S, N—R₁; Z₂ is N; Z₃ is CR₂; Y₁, Y₂ are C; Y₃, Y₄ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₃ is the carbon atom to which the remainder of     the molecule is attached. -   212. Z₁ is O, S, N—R₁; Z₃ is N Z₂ is CR₂; Y₁, Y₂ are C; Y₃, Y₄ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₂ is the carbon atom to which the remainder of     the molecule is attached. -   213. Z₂ is O, S, N—R₁; Z₁, Z₃ are independently CR₂; Y₁, Y₂ are C;     Y₃, Y₄ are independently C, CH, N (in between a double bond might be     present); W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=0-2; u=1-3; One of Z₂, Z₃ is the carbon atom to     which the remainder of the molecule is attached. -   214. Z₂ is O, S, N—R₁; Z₁ is N; Z₃ is CR₂; Y₁, Y₂ are C; Y₃, Y₄ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₃ is the carbon atom to which the remainder of     the molecule is attached. -   215. Z₂ is O, S, N—R₁; Z₃ is N Z₁ is CR₂; Y₁, Y₂ are C; Y₃, Y₄ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₁ is the carbon atom to which the remainder of     the molecule is attached. -   216. Z₃ is O, S, N—R₁; Z₁, Z₂ are independently CR₂; Y₁, Y₂ are C;     Y₃, Y₄ are independently C, CH, N (in between a double bond might be     present); W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=0-2; u=1-3; One of Z₁, Z₂ is the carbon atom to     which the remainder of the molecule is attached. -   217. Z₃ is O, S, N—R₁; Z₁ is N; Z₂ is CR₂; Y₁, Y₂ are C; Y₃, Y₄ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₂ is the carbon atom to which the remainder of     the molecule is attached. -   218. Z₃ is O, S, N—R₁; Z₁ is CH₂; Z₂ is N; Y₁, Y₂ are C; Y₃, Y₄ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₁ is the carbon atom to which the remainder of     the molecule is attached. -   219. Z₁, Z₂, Z₃ are independently CR₂; Y₁ is N; Y₂ is C; Y₃, Y₄ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; One of Z₁; Z₂, Z₃ is the carbon atom to which     the remainder of the molecule is attached. -   220. Z₁ is N; Z₂, Z₃ are CR₂; Y₁ is N; Y₂ is C; Y₃, Y₄ are     independently C, CH. N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; One of Z₂, Z₃ is the carbon atom to which the     remainder of the molecule is attached. -   221. Z₁, Z₂ are N; Z₃ is CR₂; Y₁ is N; Y₂ is C; Y₃, Y₄ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₃ is the carbon atom to which the remainder of     the molecule is attached. -   222. Z₁, Z₃ are N; Z₂ is CR₂; Y₁ is N; Y₂ is C; Y₃, Y₄ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₂ is the carbon atom to which the remainder of     the molecule is attached. -   223. Z₁, Z₂, Z₃ are independently CR₂; Y₂ is N; Y₁ is C; Y₃, Y₄ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; One of Z₁, Z₂, Z₃ is the carbon atom to which     the remainder of the molecule is attached. -   224. Z₁ is N; Z₂, Z₃ are independently CR₂; Y₂ is N; Y₁ is C; Y₃, Y₄     are independently C, CH. N (in between a double bond might be     present); W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r)     (r=0-2), CR₄R₄; t=0-2; u=1-3; One of Z₂, Z₃ is the carbon atom to     which the remainder of the molecule is attached. -   225. Z₁, Z₂ are N; Z₃ is CR₂; Y₂ is N; Y₁ is C; Y₃, Y₄ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₃ is the carbon atom to which the remainder of     the molecule is attached. -   226. Z₁, Z₃ are N; Z₂ is CR₂; Y₂ is N; Y₁ is C; Y₃, Y₄ are     independently C, CH, N (in between a double bond might be present);     W₁, W₂, W₃, W₄, W₅ are independently N—R₁, O, S═(O)_(r) (r=0-2),     CR₄R₄; t=0-2; u=1-3; Z₂ is the carbon atom to which the remainder of     the molecule is attached. The preferred embodiments of formula 10-A: -   227. Z₁, Z₂, Z₃, Z₄, Z₆, Z₇, Z₈, Z₉ are independently CR₂; Z₅ is O,     S, N—R₁; Y₁, Y₂, Y₃, Y₄ are C; one of Z₁, Z₂, Z₃, Z₄, Z₁, Z₇, Z₈, Z₉     must be a carbon atom to which the remainder of the molecule is     attached. -   228. Z₁ is N; Z₂, Z₃, Z₄, Z₆, Z₇, Z₈, Z₉ are independently CR₂; Z₅     is O, S, N—R₁; Y₁, Y₂, Y₃, Y₄ are C; one of Z₂, Z₃, Z₄, Z₁, Z₇, Z₈,     Z₉ must be a carbon atom to which the remainder of the molecule is     attached. -   229. Z₁, Z₂ are N; Z₃, Z₄, Z₆, Z₇, Z₈, Z₉ are independently CR₂; Z₅     is O, S, N—R₁; Y₁, Y₂, Y₃, Y₄ are C; one of Z₃, Z₄, Z₆, Z₇, Z₈, Z₉     must be a carbon atom to which the remainder of the molecule is     attached. -   230. Z₁, Z₃ are N; Z₂, Z₄, Z₆, Z₇, Z₈, Z₉ are independently CR₂; Z₅     is O, S, N—R₁; Y₁, Y₂, Y₃, Y₄ are C; one of Z₂, Z₄, Z₁, Z₇, Z₈, Z₉     must be a carbon atom to which the remainder of the molecule is     attached. -   231. Z₁, Z₄ are N; Z₃, Z₆, Z₇, Z₈, Z₉ are independently CR₂; Z₅ is     O, S, N—R₁; Y₁, Y₂, Y₃, Y₄ are C; one of Z₃, Z₄, Z₇, Z₈, Z₉ must be     a carbon atom to which the remainder of the molecule is attached. -   232. Z₁ is N; Z₂, Z₃, Z₄ are independently CR₂; Z₆, Z₇, Z₈, Z₉ are     independently N, CR₂; Z₅ is O, S, N—R₁; Y₁, Y₂, Y₃, Y₄ are C; one of     Z₂, Z₃, Z₄, Z₆, Z₇, Z₈, Z₉ must be a carbon atom to which the     remainder of the molecule is attached. -   233. Z₁, Z₂ are N; Z₃, Z₄ are independently CR₂; Z₄, Z₇, Z₈, Z₉ are     independently N, CR₂; Z₅ is O, S, N—R₁; Y₁, Y₂, Y₃, Y₄ are C; one of     Z₃, Z₄, Z₆, Z₇, Z₈, Z₉ must be a carbon atom to which the remainder     of the molecule is attached. -   234. Z₁, Z₃ are N; Z₂, Z₄ are independently CR₂; Z₆, Z₇, Z₈, Z₉ are     independently N, CR₂; Z₅ is O, S, N—R₁; Y₁, Y₂, Y₃, Y₄ are C; one of     Z₂, Z₄, Z₆, Z₇, Z₈, Z₉ must be a carbon atom to which the remainder     of the molecule is attached. -   235. Z₁, Z₄ are N; Z₂, Z₃ are independently CR₂; Z₄, Z₇, Z₈, Z₉ are     independently N, CR₂; Z₅ is O, S, N—R₁; Y₁, Y₂, Y₃, Y₄ are; C; one     of Z₂, Z₃, Z₆, Z₇, Z₈, Z₉ must be a carbon atom to which the     remainder of the molecule is attached. -   236. Z₂ is N; Z₁, Z₃, Z₄, Z₄, Z₇, Z₈, Z₉ are independently CR₂; Z₅     is O, S, N—R₁; Y₁, Y₂, Y₃, Y₄ are C; one of Z, Z₃, Z₄, Z₄, Z₇, Z₈,     Z₉ must be a carbon atom to which the remainder of the molecule is     attached. -   237. Z₂, Z₃ are N; Z₁, Z₄, Z₆, Z₇, Z₈, Z₄ are independently CR₂; Z₅     is O, S, N—R₁; Y₁, Y₂, Y₃, Y₄ are C; one of Z₁, Z₄, Z₆, Z₇, Z₈, Z₉     must be a carbon atom to which the remainder of the molecule is     attached. -   238. Z₂; Z₄ are N; Z₁, Z₃, Z₆, Z₇, Z₈, Z₄ are independently CR₂; Z₅     is O, S, N—R₁; Y₁, Y₂, Y₃, Y₄ are C; one of Z₁, Z₃, Z₄, Z₇, Z₈, Z₉     must be a carbon atom to which the remainder of the molecule is     attached. -   239. Z₂ is N; Z₁, Z₃, Z₄ are independently CR₂; Z₆, Z₇, Z₈, Z₉ are     independently N, CR₂; Z₅ is O, S, N—R₁; Y₁, Y₂, Y₃, Y₄ are C; one of     Z₁, Z₃, Z₄, Z₆, Z₇, Z₈, Z₉ must be a carbon atom to which the     remainder of the molecule is attached. -   240. Z₂, Z₃ are N; Z₁, Z₄ are independently CR₂; Z₆, Z₇, Z₈, Z₉ are     independently N, CR₂; Z₅ is O, S, N—R₁; Y₁, Y₂, Y₃, Y₄ are C; one of     Z₁, Z₄, Z₆, Z₇, Z₈, Z₉ must be a carbon atom to which the remainder     of the molecule is attached. -   241. Z₂, Z₄ are N; Z₁, Z₃ are independently CR₂; Z₆, Z₇, Z₈, Z₄ are     independently N, CR₂; Z₅ is O, S, N—R₁; Y₁, Y₂, Y₃, Y₄ are C; one of     Z₁, Z₃, Z₆, Z₇, Z₈, Z₉ must be a carbon atom to which the remainder     of the molecule is attached.

The preferred embodiments of formula 11-A:

-   242. Z₁, Z₂, Z₃, Z₄, Z₆, Z₇, Z₈, Z₉ are independently CR₂; Z₅, Z₁₀     are independently O, S, N—R₁; Y₁, Y₂, Y₃, Y₄ are C; Any one of Z₁,     Z₂, Z₃, Z₄, Z₆, Z₇, Z₈, Z₉ must be a carbon atom to which the     remainder of the molecule is attached. -   243. Z₁, Z₂, Z₃, Z₄, Z₆, Z₇, Z₈, Z₉ are independently N, CR₂; Z₅,     Z₁₀ are independently O, S, N—R₁; Y₁, Y₂, Y₃, Y₄ are C; Any one of     Z₁, Z₂, Z₃, Z₄, Z₆, Z₇, Z₈, Z₄ must be a carbon atom to which the     remainder of the molecule is attached.

The preferred embodiments of formula 11-B:

-   244. Z₁, Z₂, Z, Z₄, Z₇, Z₈, Z₄, Z₁₀ are independently CR₂; Z₅, Z₆     are independently N, CR₂; Y₁, Y₂, Y₃, Y₄ are C; Any one of Z₁, Z₂,     Z₃, Z₄, Z₇, Z₈, Z, Z must be a carbon atom to which the remainder of     the molecule is attached. -   245. 163. Z₁, Z₂, Z₃, Z₄ are independently CR₂, N; Z₅, Z₆, Z₇, Z₈,     Z₉, Z₁₀ are independently CR₂; Y₁, Y₂, Y₃, Y₄ are C; Any one of Z₁,     Z₂, Z₃, Z₄, Z₇, Z₈, Z₉, Z₁₀ must be a carbon atom to which the     remainder of the molecule is attached.

The preferred embodiments of formula 11-C:

-   246. Z₁, Z₂, Z₃, Z₄, Z₁, Z₇, Z₈, Z₉ are independently CR₂; Y₁ is N;     Y₂ is C; Any one of Z₁, Z₂, Z₃, Z₄, Z₆, Z₇, Z₈, Z₉ must be a carbon     atom to which the remainder of the molecule is attached. -   247. Z₁, Z₂, Z₃, Z₄, Z₇, Z₈, Z₉ are independently CR₂; Z₁ is O, S,     N—R₁; Y₁ is C; Y₂ is N; Any one of Z₁, Z₂, Z₃, Z₄, Z₆, Z₇, Z₈, Z₉     must be a carbon atom to which the remainder of the molecule is     attached.

The preferred embodiments of formula 12-A:

-   248. Z₁, Z₂, Z₃, Z₄ are independently CR₂; Z₅ is O, S, N—R₁; W₁, W₂,     W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso     that no S—S, S—O or O—O bond formation can occur to form a saturated     ring. In the ring formed by W₁, W₂, W₃ one double bond might be     present; t=1-4; Y₁, Y₂, Y₃, Y₄ are C; Any one of Z₁, Z₂, Z₃, Z₄ must     be a carbon atom to which the remainder of the molecule is attached. -   249. Z₁, Z₂, Z₃, Z₄ are independently CR₂; Z₅ is N, CR₂; W₁, W₂, W₃     are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso     that no S—S, S—O or O—O bond formation can occur to form a saturated     ring; In the ring formed by W₁, W₂, W₃ one double bond might be     present; t=1-4; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₁, Z₂, Z₃, Z₄     must be a carbon atom to which the remainder of the molecule is     attached. -   250. Z₁, Z₂, Z₃, Z₄ are independently CR₂; Z₅ is O, S. N; W₁, W₂, W₃     are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso     that no S—S, S—O or O—O bond formation can occur to form a saturated     ring; In the ring formed by W₁, W₂, W₃ one double bond might be     present; t=1-3; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₁, Z₂, Z₃, Z₄     must be a carbon atom to which the remainder of the molecule is     attached. -   251. Z₁ is N; Z₂, Z₃, Z₄ are independently CR₂; Z₅ is O, S, N—R₁;     W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring. In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃, Y₄ are C; Any one of Z₂, Z₃, Z₄     must be a carbon atom to which the remainder of the molecule is     attached. -   252. Z₁, Z₂ are N; Z₃, Z₄ are independently CR₂; Z₅ is O, S, N—R₁;     W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring. In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃, Y₄ are C; Any one of Z₃, Z₄     must be a carbon atom to which the remainder of the molecule is     attached. -   253. Z₁, Z₃ are N; Z₂, Z₄ are independently CR₂; Z₅ is O, S, N—R₁;     Z₁, Z₂ are N; Z₃, Z₄ are independently CR₂; Z₅ is N, CR₂; W₁, W₂, W₃     are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso     that no S—S, S—O or O—O bond formation can occur to form a saturated     ring; In the ring formed by W., W₂, W₃ one double bond might be     present; t=1-4; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₂; Z₄ must be     a carbon atom to which the remainder of the molecule is attached. -   254. Z₁, Z₄ are N; Z₂, Z₃ are independently CR₂; Z₅ is O, S, N—R₁;     W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring. In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃, Y₄ are C; Any one of Z₂, Z₃     must be a carbon atom to which the remainder of the molecule is     attached. -   255. Z₁ is N; Z₂, Z₃, Z₄ are independently CR₂; Z₅ is N, CR₂; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₂,     Z₃, Z₄ must be a carbon atom to which the remainder of the molecule     is attached. -   256. Z₁, Z₃ are N; Z₂, Z₄ are independently CR₂; Z₅ is N, CR₂; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₂,     Z₄ must be a carbon atom to which the remainder of the molecule is     attached. -   257. Z₁, Z₄ are N; Z₂, Z₃ are independently CR₂; Z₅ is N, CR₂; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₂,     Z₃ must be a carbon atom to which the remainder of the molecule is     attached. -   258. Z₁, Z₂ are N; Z₃, Z₄ are independently CR₂; Z₅ is O, S. N; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-3; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₃,     Z₄ must be a carbon atom to which the remainder of the molecule is     attached. -   259. Z₁, Z₃ are N; Z₂, Z₄ are independently CR₂; Z₅ is O, S. N; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-3; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₂,     Z₄ must be a carbon atom to which the remainder of the molecule is     attached. -   260. Z₁, Z₄ are N; Z₂, Z₃ are independently CR₂; Z₅ is O, S. N; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-3; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₂,     Z₃ must be a carbon atom to which the remainder of the molecule is     attached. -   261. Z₂ is N; Z₁, Z₃, Z₄ are independently CR₂; Z₅ is O, S, N—R₁;     W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring. In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃, Y₄ are C; Any one of Z₁, Z₃, Z₄     must be a carbon atom to which the remainder of the molecule is     attached. -   262. Z₂, Z₃ are N; Z₁, Z₄ are independently CR₂; Z₅ is O, S, N—R₁;     W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring. In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃, Y₄ are C; Any one of Z₁, Z must     be a carbon atom to which the remainder of the molecule is attached. -   263. Z₂; Z₄ are N; Z₁, Z₃ are independently CR₂; Z₅ is O, S, N—R₁;     W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring. In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃, Y₄ are C; Any one of Z₁, Z₃     must be a carbon atom to which the remainder of the molecule is     attached. -   264. Z₂ is N; Z₁, Z₃, Z₄ are independently CR₂; Z₅ is N, CR₂; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₁,     Z₃, Z₄ must be a carbon atom to which the remainder of the molecule     is attached. -   265. Z₂, Z₃ are N; Z₁, Z₄ are independently CR₂; Z₅ is N, CR₂; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₁;     Z₄ must be a carbon atom to which the remainder of the molecule is     attached. -   266. Z₂, Z₄ are N; Z₁, Z₃ are independently CR₂; Z₅ is N, CR₂; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₁,     Z₃ must be a carbon atom to which the remainder of the molecule is     attached. -   267. Z₂ is N; Z₁, Z₃, Z₄ are independently CR₂; Z₅ is O, S. N; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-3; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₁,     Z₃, Z₄ must be a carbon atom to which the remainder of the molecule     is attached. -   268. Z₂, Z₃ are N; Z₁, Z₄ are independently CR₂; Z₅ is O, S. N; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-3; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₁;     Z₄ must be a carbon atom to which the remainder of the molecule is     attached. -   269. Z₂, Z₃ are N; Z₁, Z₃ are independently CR₂; Z₅ is O, S. N; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-3; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₁,     Z₃ must be a carbon atom to which the remainder of the molecule is     attached. -   270. Z₃ is N; Z₁, Z₂, Z₄ are independently CR₂; Z₅ is O, S, N—R₁;     W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring. In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃, Y₄ are C; Any one of Z₁, Z₂, Z₄     must be a carbon atom to which the remainder of the molecule is     attached. -   271. Z₃, Z₄ are N; Z₁, Z₄ are independently CR₂; Z₅ is O, S, N—R₁;     W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring. In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃, Y₄ are C; Any one of Z₁, Z₂     must be a carbon atom to which the remainder of the molecule is     attached. -   272. Z₃ is N; Z₁, Z₃, Z₄ are independently CR₂; Z₅ is N, CR₂; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₁,     Z₂, Z₄ must be a carbon atom to which the remainder of the molecule     is attached. -   273. Z₃, Z₄ are N; Z₁, Z₂ are independently CR₂; Z₅ is N, CR₂; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₁,     Z₂ must be a carbon atom to which the remainder of the molecule is     attached. -   274. Z₃ is N; Z₁, Z₃, Z₄ are independently CR₂; Z₅ is O, S. N; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-3; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₁,     Z₂, Z₄ must be a carbon atom to which the remainder of the molecule     is attached. -   275. Z₃, Z₄ are N; Z₁, Z₄ are independently CR₂; Z₅ is O, S. N; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-3; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₁,     Z₂ must be a carbon atom to which the remainder of the molecule is     attached. -   276. Z₁, Z₂, Z₃ are independently CR₂; Z₄ is N; Z₅ is O, S, N—R₁;     W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring. In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃, Y₄ are C; Any one of Z₁, Z₂,     Z₃, must be a carbon atom to which the remainder of the molecule is     attached. -   277. Z₁, Z₂, Z₃ are independently CR₂; Z₄ is N; Z₅ is N, CR₂; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-4; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₁,     Z₂, Z₃ must be a carbon atom to which the remainder of the molecule     is attached. -   278. Z₁, Z₂, Z₃ are independently CR₂; Z₄ is N; Z₅ is O, S. N; W₁,     W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; In the ring formed by W₁, W₂, W₃ one double bond     might be present; t=1-3; Y₁, Y₂, Y₃ are C; Y₄ is N; Any one of Z₁,     Z₂, Z₃, Z₄ must be a carbon atom to which the remainder of the     molecule is attached. The preferred embodiments of formula 12-B: -   279. Z₁, Z₂, Z₃, Z are independently CR₂; Z₅ is O, S, N—R₁; Y₁, Y₂,     Y₃, Y₄ are C; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₄ must be a     carbon atom to which the remainder of the molecule is attached. -   280. Z₁ is N; Z₂, Z₃, Z₄ are independently CR₂; Z₅ is O, S, N—R₁;     Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₄ must be     a carbon atom to which the remainder of the molecule is attached. -   281. Z₁, Z₂ are N; Z₃, Z₄ are independently CR₂; Z₅ is O, S, N—R₁;     Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₃, Z₄ must be a     carbon atom to which the remainder of the molecule is attached. -   282. Z₁, Z₃ are N; Z₂, Z₄ are independently CR₂; Z₅ is O, S, N—R₁;     Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₂, Z₄ must be a     carbon atom to which the remainder of the molecule is attached. -   283. Z₂ is N; Z₁, Z₃, Z₄ are independently CR₂; Z₅ is O, S, N—R₁;     Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₄ must be     a carbon atom to which the remainder of the molecule is attached. -   284. Z₂, Z₃ are N; Z₁, Z₄ are independently CR₂; Z₅ is O, S, N—R₁;     Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₁; Z₄ must be a     carbon atom to which the remainder of the molecule is attached. -   285. Z₃ is N; Z₁, Z₂ Z are independently CR₂; Z₅ is O, S, N—R₁; Y₁,     Y₂, Y₃, Y₄ are C; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2), O,     N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₁, Z₂ Z must be a     carbon atom to which the remainder of the molecule is attached. -   286. Z₁, Z₂, Z₃, Z₅ are independently CR₂; Z₄ is O, S, N—R₁; Y₁, Y₂,     Y₃, Y₄ are C; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₅ must be a     carbon atom to which the remainder of the molecule is attached. -   287. Z₁ is N; Z₂, Z₃, Z₅ are independently CR₂; Z₄ is O, S, N—R₁;     Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₅ must be     a carbon atom to which the remainder of the molecule is attached. -   288. Z₁, Z₂ are N; Z₃, Z₅ are independently CR₂; Z₄ is O, S, N—R₁;     Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₃, Z₅ must be a     carbon atom to which the remainder of the molecule is attached. -   289. Z₁, Z₃ are N; Z₂, Z₅ are independently CR₂; Z₄ is O, S, N—R₁;     Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₂, Z₅ must be a     carbon atom to which the remainder of the molecule is attached. -   290. Z₂ is N; Z₁, Z₃, Z₅ are independently CR₂; Z₄ is O, S, N—R₁;     Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₅ must be     a carbon atom to which the remainder of the molecule is attached. -   291. Z₂, Z₃ are N; Z₁, Z₅ are independently CR₂; Z is O, S, N—R₁;     Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₁; Z₅ must be a     carbon atom to which the remainder of the molecule is attached. -   292. Z₃ is N; Z₁, Z₂, Z₅ are independently CR₂; Z₄ is O, S, N—R₁;     Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₅ must be     a carbon atom to which the remainder of the molecule is attached. -   293. Z₁, Z₂, Z₃, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃ are C; Y₄     is N; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with     the proviso that no S—S, S—O or O—O bond formation can occur to form     a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₄ must be a carbon     atom to which the remainder of the molecule is attached. -   294. Z₁ is N; Z₂, Z₃, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃ are     C; Y₄ is N; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₄ must be a carbon     atom to which the remainder of the molecule is attached. -   295. Z₁, Z₂ are N; Z₃, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃ are     C; Y₄ is N; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₃, Z₄ must be a carbon     atom to which the remainder of the molecule is attached. -   296. Z₁, Z₃ are N; Z₂, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃ are     C; Y₄ is N; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z, Z₅ must be a carbon     atom to which the remainder of the molecule is attached. -   297. Z₂ is N; Z₁, Z₃, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃ are     C; Y₄ is N; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₃. Z must be a carbon     atom to which the remainder of the molecule is attached. -   298. Z₂, Z₃ are N; Z₁, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃ are     C; Y₄ is N; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₄, Z₅ must be a carbon     atom to which the remainder of the molecule is attached. -   299. Z₃ is N; Z₁, Z₂, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃ are     C; Y₄ is N; W₁, W₂ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₄, Z₅ must be a     carbon atom to which the remainder of the molecule is attached.

The preferred embodiments of formula 13-A:

-   300. Z₁, Z₂, Z₃, Z₄, Z₅, Z₆ are independently N, CR₂; Y₁, Y₂, Y₃, Y₄     are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z, Z₅, Z₆ must     be a carbon atom to which the remainder of the molecule is attached. -   301. Z₁ is N; Z₂, Z₃, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₄, Z₅, Z₆ must be     a carbon atom to which the remainder of the molecule is attached. -   302. Z₁, Z₂ are N; Z₃, Z₄, Z₅, Z₈ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₃, Z₄, Z₅, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   303. Z₁, Z₃ are N; Z₂, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z₄, Z₅, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   304. Z₁, Z₄ are N; Z₂, Z₃, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₅, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   305. Z₁, Z₅ are N; Z₂, Z₃, Z₄, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₄, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   306. Z₁, Z₆ are N; Z₂, Z₃, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₄, Z₅ must be a     carbon atom to which the remainder of the molecule is attached. -   307. Z₂ is N; Z₁, Z₃, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₄, Z₅, Z₆ must be     a carbon atom to which the remainder of the molecule is attached. -   308. Z₂, Z₃ are N; Z₁, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₄, Z₅, Z₆ must be a carbon     atom to which the remainder of the molecule is attached. -   309. Z₂, Z₄ are N; Z₁, Z₃, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₅, Z₁ must be a     carbon atom to which the remainder of the molecule is attached. -   310. Z₂, Z₅ are N; Z₁, Z₃, Z₄, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₄, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   311. Z₂, Z₅ are N; Z₁, Z₃, Z₄, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₄, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   312. Z₂, Z₆ are N; Z₁, Z₃, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₄, Z₅ must be a     carbon atom to which the remainder of the molecule is attached. -   313. Z₃ is N; Z₁, Z₂, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₄, Z₅, Z₆ must be     a carbon atom to which the remainder of the molecule is attached. -   314. Z₃, Z₄ are N; Z₁, Z₂, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₅, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   315. Z₃, Z₅ are N; Z₁, Z₂, Z₄, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₄, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   316. Z₃, Z₆ are N; Z₁, Z₂, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₄, Z₅ must be a     carbon atom to which the remainder of the molecule is attached. -   317. Z₄ is N; Z₁, Z₂, Z₃, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₄, must be a     carbon atom to which the remainder of the molecule is attached. -   318. Z₄, Z₅ are N; Z₁, Z₂, Z₃, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₄, Z₄, must be a     carbon atom to which the remainder of the molecule is attached. -   319. Z₅ is N; Z₁, Z₂, Z₃, Z₄, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₄, Z₆ must be     a carbon atom to which the remainder of the molecule is attached. -   320. Z₅, Z₆ are N; Z₁, Z₂, Z₃, Z₄ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₄ must be a     carbon atom to which the remainder of the molecule is attached. -   321. Z₆ is N; Z₁, Z₂, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃, Y₄     are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₄, Z₅ must be     a carbon atom to which the remainder of the molecule is attached.

The preferred embodiments of formula 13-B:

-   322. Z₁, Z₂, Z₃, Z₄, Z₅, Z₆ are independently N, CR₂; Y₁, Y₂, Y₃, Y₄     are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₄, Z₅, Z₆ must     be a carbon atom to which the remainder of the molecule is attached. -   323. Z₁ is N; Z₂, Z₃, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₄, Z, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   324. Z₁, Z₂ are N; Z₃, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₃, Z₄, Z₅, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   325. Z₁, Z₃ are N; Z₂, Z₄, Z₄, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z₄, Z₅, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   326. Z₁, Z₄ are N; Z₂, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₄, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   327. Z₁, Z₄ are N; Z₂, Z₃, Z₄, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₄, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   328. Z₁, Z₆ are N; Z₂, Z₃, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₄, Z₅ must be a     carbon atom to which the remainder of the molecule is attached. -   329. Z₂ is N; Z₁, Z₃, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₄, Z₅, Z must be a     carbon atom to which the remainder of the molecule is attached. -   330. Z₂, Z₃ are N; Z₁, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₄, Z₅, Z₁ must be a carbon     atom to which the remainder of the molecule is attached. -   331. Z₂, Z₄ are N; Z₁, Z₃, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₅, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   332. Z₂, Z₅ are N; Z₁, Z₃, Z₄, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₄, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   333. Z₂, Z₅ are N; Z₁, Z₃, Z₄, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₄, Z₁ must be a     carbon atom to which the remainder of the molecule is attached. -   334. Z₂, Z₆ are N; Z₁, Z₃, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₄, Z₅ must be a     carbon atom to which the remainder of the molecule is attached. -   335. Z₃ is N; Z₁, Z₂, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₄, Z₅, Z₆ must be     a carbon atom to which the remainder of the molecule is attached. -   336. Z₃, Z₄ are N; Z₁, Z₂, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₅, Z₄ must be a     carbon atom to which the remainder of the molecule is attached. -   337. Z₃, Z₅ are N; Z₁, Z₂, Z₄, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₄, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   338. Z₃, Z₆ are N; Z₁, Z₂, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₄, Z₅ must be a     carbon atom to which the remainder of the molecule is attached. -   339. Z₄ is N; Z₁, Z₂, Z₃, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₅, Z₆ must be     a carbon atom to which the remainder of the molecule is attached. -   340. Z₄, Z₅ are N; Z₁, Z₂, Z₃, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₅, Z₆ must be     a carbon atom to which the remainder of the molecule is attached. -   341. Z₅ is N; Z₁, Z₂, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₄, Z₆ must be     a carbon atom to which the remainder of the molecule is attached. -   342. Z₅, Z₆ are N; Z₁, Z₂, Z₃, Z₄ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₄ must be a     carbon atom to which the remainder of the molecule is attached. -   343. Z₆ is N; Z₁, Z₂, Z₃, Z₄, Z₄ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z, Z₂, Z₃, Z₄, Z₅ must be a     carbon atom to which the remainder of the molecule is attached.

The preferred embodiments of formula 13-C:

-   344. Z₁, Z₂, Z₃, Z₄, Z₅, Z₆ are independently N, CR₂; Y₁, Y₂, Y₃, Y₄     are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₄, Z₅, Z₆ must     be a carbon atom to which the remainder of the molecule is attached. -   345. Z₁ is N; Z₂, Z₃, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₄, Z₅, Z₆ must be     a carbon atom to which the remainder of the molecule is attached. -   346. Z₁, Z₂ are N; Z₃, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₃, Z₄, Z₅, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   347. Z₁, Z₃ are N; Z₂, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z₄, Z₅, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   348. Z₁, Z₄ are N; Z₂, Z₃, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₅, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   349. Z₁, Z₅ are N; Z₂, Z₃, Z₄, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₄, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   350. Z₁, Z₆ are N; Z₂, Z₃, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₄, Z₅ must be a     carbon atom to which the remainder of the molecule is attached. -   351. Z₂ is N; Z₁, Z₃, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₄, Z₅, Z₆ must be     a carbon atom to which the remainder of the molecule is attached. -   352. Z₂, Z₃ are N; Z₁, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₄, Z₅, Z₆ must be a carbon     atom to which the remainder of the molecule is attached. -   353. Z₂, Z₄ are N; Z₁, Z₃, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₅, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   354. Z₂, Z₁ are N; Z₁, Z₃, Z₄, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₄, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   355. Z₂, Z₅ are N; Z₁, Z₃, Z₄, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₄, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   356. Z₂, Z₆ are N; Z₁, Z₃, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₄, Z₅ must be a     carbon atom to which the remainder of the molecule is attached. -   357. Z₃ is N; Z₁, Z₂, Z₄, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₄, Z₁, Z₆ must be     a carbon atom to which the remainder of the molecule is attached. -   358. Z₃, Z₄ are N; Z₁, Z₂, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₁, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   359. Z₃, Z₁ are N; Z₁, Z₂, Z₄, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₄, Z₆ must be a     carbon atom to which the remainder of the molecule is attached. -   360. Z₃, Z₆ are N; Z₁, Z₂, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₄, Z₅ must be a     carbon atom to which the remainder of the molecule is attached. -   361. Z₄ is N; Z₁, Z₂, Z₃, Z₅, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₅, Z₆ must be     a carbon atom to which the remainder of the molecule is attached. -   362. Z₄, Z₅ are N; Z₁, Z₂, Z₃, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₄, Z₅, Z₆ must be     a carbon atom to which the remainder of the molecule is attached. -   363, Z₅ is N; Z₁, Z₂ 14, Z₄, Z₆ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₄, Z₆ must be     a carbon atom to which the remainder of the molecule is attached. -   364. Z₅, Z₆ are N; Z₁, Z₂, Z₃, Z₄ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₄ must be a     carbon atom to which the remainder of the molecule is attached. -   365. Z₆ is N; Z₁, Z₂, Z₃, Z₄, Z₅ are independently CR₂; Y₁, Y₂, Y₃,     Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁     with the proviso that no S—S, S—O or O—O bond formation can occur to     form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₃, Z₄, Z₅ must be     a carbon atom to which the remainder of the molecule is attached.

The preferred embodiments of formula 14-A and 14-B:

-   366. Z₁ is N; Z₂, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ are independently CR₂; Y₁,     Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₄, Z₅,     Z₆, Z₇, Z₈ must be a carbon atom to which the remainder of the     molecule is attached. -   367. Z₁, Z₂ are N; Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ are independently CR₂; Y₁,     Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₃, Z₄, Z₅, Z₆,     Z₇, Z₈ must be a carbon atom to which the remainder of the molecule     is attached. -   368. Z₁, Z₃ are N; Z₂, Z₄, Z₅, Z₆, Z₇, Z₈ are independently CR₂; Y₁,     Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₂, Z₄, Z₅, Z₆,     Z₇, Z₈ must be a carbon atom to which the remainder of the molecule     is attached. -   369. Z₁, Z₄ are N; Z₂, Z₃, Z₅, Z₆, Z₇, Z₈ are independently CR₂; Y₁,     Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₂, Z₃, Z₅, Z₆,     Z₇, Z₈ must be a carbon atom to which the remainder of the molecule     is attached. -   370. Z₁, Z₂ are N; Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ are independently CR₂; Y₁,     Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₃, Z₄, Z₅, Z₆,     Z₇, Z₈ must be a carbon atom to which the remainder of the molecule     is attached. -   371. Z₁ is N; Z₂, Z₃, Z₄ are independently CR₂; Z₅, Z₆, Z₇, Z₄ are     independently N, CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are     independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso that no     S—S, S—O or O—O bond formation can occur to form a saturated ring;     t=1-3. Any one of Z₂, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ must be a carbon atom     to which the remainder of the molecule is attached. -   372. Z₁, Z₂ are N; Z₃, Z₄ are independently CR₂; Z₅, Z₆, Z₇, Z₈ are     independently N, CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are     independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso that no     S—S, S—O or O—O bond formation can occur to form a saturated ring;     t=1-3. Any one of Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ must be a carbon atom to     which the remainder of the molecule is attached. -   373. Z₁, Z₃ are N; Z₂; Z₄ are independently CR₂; Z₅, Z₆, Z₇, Z₈ are     independently N, CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are     independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso that no     S—S, S—O or O—O bond formation can occur to form a saturated ring;     t=1-3. Any one of Z₂, Z₄, Z₅, Z₆, Z₇, Z₈ must be a carbon atom to     which the remainder of the molecule is attached. -   374. Z₁, Z₄ are N; Z₂, Z₃ are independently CR₂; Z₅, Z₆, Z₇, Z₈ are     independently N, CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are     independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso that no     S—S, S—O or O—O bond formation can occur to form a saturated ring;     t=1-3. Any one of Z₂, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ must be a carbon atom     to which the remainder of the molecule is attached. -   375. Z₁, Z₂ are N; Z₃, Z₄ are independently CR₂; Z₅, Z₆, Z₇, Z₈ are     independently N, CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are     independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso that no     S—S, S—O or O—O bond formation can occur to form a saturated ring;     t=1-3. Any one of Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ must be a carbon atom to     which the remainder of the molecule is attached. -   376. Z₂ is N; Z₁, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ are independently CR₂; Y₁,     Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₄, Z₅,     Z₆, Z₇, Z₈ must be a carbon atom to which the remainder of the     molecule is attached. -   377. Z₂, Z₃ are N; Z₁, Z₄, Z₅, Z₆, Z₇, Z₈ are independently CR₂; Y₁,     Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₁, Z₄, Z₅, Z₆,     Z₇, Z₈ must be a carbon atom to which the remainder of the molecule     is attached. -   378. Z₂, Z₄ are N; Z₁, Z₃, Z₅, Z₆, Z₇, Z₈ are independently CR₂; Y₁,     Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₁, Z₃, Z₅, Z₆,     Z₇, Z₈ must be a carbon atom to which the remainder of the molecule     is attached. -   379. Z₂ is N; Z₁, Z₃, Z are independently CR₂; Z₅, Z₆-Z₇, Z₈ are     independently N, CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are     independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso that no     S—S, S—O or O—O bond formation can occur to form a saturated ring;     t=1-3. Any one of Z₁, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ must be a carbon atom     to which the remainder of the molecule is attached. -   380. Z₂, Z₃ are N; Z₁, Z₄ are independently CR₂; Z₅, Z₆, Z₇, Z₈ are     independently N, CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are     independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso that no     S—S, S—O or O—O bond formation can occur to form a saturated ring;     t=1-3. Any one of Z₁, Z₄, Z₅, Z₆, Z₇, Z₈ must be a carbon atom to     which the remainder of the molecule is attached. -   381. Z₂, Z₄ are N; Z₁, Z₃ are independently CR₂; Z₅, Z₆, Z₇, Z₈ are     independently N, CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are     independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso that no     S—S, S—O or O—O bond formation can occur to form a saturated ring;     t=1-3. Any one of Z₁, Z₃, Z₅, Z₆, Z₇, Z₈ must be a carbon atom to     which the remainder of the molecule is attached. -   382. Z₃ is N; Z₁, Z₂, Z₄, Z₅, Z₆, Z₇, Z₈ are independently CR₂; Y₁,     Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₄, Z₅,     Z₆, Z₇, Z₈ must be a carbon atom to which the remainder of the     molecule is attached. -   383. Z₃, Z₄ are N; Z₁, Z₂, Z₅, Z₆, Z₇, Z₈ are independently CR₂; Y₁,     Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are independently CR₄R₄, S(O)r (r=0-2),     O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can     occur to form a saturated ring; t=1-3. Any one of Z₁, Z₂, Z₅, Z₆,     Z₇, Z₈ must be a carbon atom to which the remainder of the molecule     is attached. -   384. Z₄ is N; Z₁, Z₃, Z₄ are independently CR₂; Z₅, Z₆, Z₇, Z₈ are     independently N, CR₂; Y₁, Y₂, Y₃, Y₄ are C; W₁, W₂, W₃ are     independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso that no     S—S, S—O or O—O bond formation can occur to form a saturated ring;     t=1-3. Any one of Z₁, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ must be a carbon atom     to which the remainder of the molecule is attached.

The preferred embodiments of formula 15-A:

-   385. Z₁ is N; Z₂, Z₃, Z₄ are independently CR₂; Y₁, Y₂ are C; Y₃, Y₄     are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁, a     bond; W₂ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; t=0-2; W₃, W₄, W₅ are     independently O, S (O)_(r) (r=0-2), CR₄R₄, N—R₁ with the proviso     that no S—S, S—O or O—O bond formation can occur to form a saturated     ring; u=1-3; Any one of Z₂, Z₃, Z₄ must be a carbon atom to which     the remainder of the molecule is attached. -   386. Z₁, Z₂ are N; Z₃, Z₄ are independently CR₂; Y₁, Y₂ are C; Y₃,     Y₄ are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁, a     bond; W₂ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; t=0-2; W₃, W₄, W₅ are     independently O, S (O)_(r) (r=0-2), CR₄R₄, N—R₁ with the proviso     that no S—S, S—O or O—O bond formation can occur to form a saturated     ring; u=1-3; Any one of Z₃, Z₄ must be a carbon atom to which the     remainder of the molecule is attached. -   387. Z₁, Z₃ are N; Z₂, Z₄ are independently CR₂; Y₁, Y₂ are C; Y₃,     Y₄ are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁, a     bond; W₂ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; t=0-2; W₃, W₄, W₅ are     independently O, S (O)_(r) (r=0-2), CR₄R₄, N—R₁ with the proviso     that no S—S, S—O or O—O bond formation can occur to form a saturated     ring; u=1-3; Any one of Z₂, Z₄ must be a carbon atom to which the     remainder of the molecule is attached. -   388. Z₁, Z₄ are N; Z₂, Z₃ are independently CR₂; Y₁, Y₂ are C; Y₃,     Y₄ are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁, a     bond; W₂ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; t=0-2; W₃, W₄, W₅ are     independently O, S (O)_(r) (r=0-2), CR₄R₄, N—R₁ with the proviso     that no S—S, S—O or O—O bond formation can occur to form a saturated     ring; u=1-3; Any one of Z₂, Z₃ must be a carbon atom to which the     remainder of the molecule is attached. -   389. Z₂ is N; Z₁, Z₃, Z₄ are independently CR₂; Y₁, Y₂ are C; Y₃, Y₄     are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁, a     bond; W₂ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; t=0-2; W₃, W₄, W₅ are     independently O, S (O)_(r) (r=0-2), CR₄R₄, N—R₁ with the proviso     that no S—S, S—O or O—O bond formation can occur to form a saturated     ring; u=1-3; Any one of Z₁, Z₃, Z₄ must be a carbon atom to which     the remainder of the molecule is attached. -   390. Z₂, Z₃ are N; Z₁, Z₄ are independently CR₂; Y₁, Y₂ are C; Y₃,     Y₄ are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁, a     bond; W₂ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; t=0-2; W₃, W₄, W₅ are     independently O, S (O)r (r=0-2), CR₄R₄, N—R₁ with the proviso that     no S—S, S—O or O—O bond formation can occur to form a saturated     ring; u=1-3; Any one of Z₁; Z₄ must be a carbon atom to which the     remainder of the molecule is attached. -   391. Z₂, Z₄ are N; Z₁, Z₃ are independently CR₂; Y₁, Y₂ are C; Y₃,     Y₄ are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁, a     bond; W₂ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; t=0-2; W₃, W₄, W₅ are     independently O, S (O)_(r) (r=0-2), CR₄R₄, N—R₁ with the proviso     that no S—S, S—O or O—O bond formation can occur to form a saturated     ring; u=1-3; Any one of Z₁, Z₃ must be a carbon atom to which the     remainder of the molecule is attached. -   392. Z₃ is N; Z₁, Z₂, Z₄ are independently CR₂; Y₁, Y₂ are C; Y₃, Y₄     are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁, a     bond; W₂ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; t=0-2; W₃, W₄, W₅ are     independently O, S (O)_(r) (r=0-2), CR₄R₄, N—R₁ with the proviso     that no S—S, S—O or O—O bond formation can occur to form a saturated     ring; u=1-3; Any one of Z₁, Z₂; Z₄ must be a carbon atom to which     the remainder of the molecule is attached. -   393. Z₃, Z₄ are N; Z₁, Z₂ are independently CR₂; Y₁, Y₂ are C; Y₃,     Y₄ are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁, a     bond; W₂ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; t=0-2; W₃, W₄, W₅ are     independently O, S (O)_(r) (r=0-2), CR₄R₄, N—R₁ with the proviso     that no S—S, S—O or O—O bond formation can occur to form a saturated     ring; u=1-3; Any one of Z₁, Z₂ must be a carbon atom to which the     remainder of the molecule is attached. -   394. Z₄ is N; Z₁, Z₂, Z₃ are independently CR₂; Y₁, Y₂ are C; Y₃, Y₄     are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁, a     bond; W₂ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; t=0-2; W₃, W₄, W₅ are     independently O, S (O)_(r) (r=0-2), CR₄R₄, N—R₁ with the proviso     that no S—S, S—O or O—O bond formation can occur to form a saturated     ring; u=1-3; Any one of Z₁, Z₂, Z₃ must be a carbon atom to which     the remainder of the molecule is attached.

The preferred embodiments of formula 15-B

-   395. Z₁ is N; Z₂, Z₃, Z₄ are independently CR₂; Y₁, Y₂ are C; Y₃, Y₄     are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; W₂,     W₃, W₄ are independently O, S(O)r (r=0-2), CR₄R₄, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; t=1-2; u=1-3; Any one of Z₂, Z₃, Z₄ must be a carbon     atom to which the remainder of the molecule is attached. -   396. Z₁, Z₂ are N; Z₃, Z₄ are independently CR₂; Y₁, Y₂ are C; Y₃,     Y₄ are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; W₂,     W₃, W₄ are independently O, S(O)r (r=0-2), CR₄R₄, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; t=1-2; u=1-3; Any one of Z₃, Z₄ must be a carbon     atom to which the remainder of the molecule is attached. -   397. Z₁, Z₃ are N; Z₂, Z₄ are independently CR₂; Y₁, Y₂ are C; Y₃,     Y₄ are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; W₂,     W₃, W₄ are independently O, S(O)r (r=0-2), CR₄R₄, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; t=1-2; u=1-3; Any one of Z₂, Z₄ must be a carbon     atom to which the remainder of the molecule is attached. -   398. Z₁, Z₄ are N; Z₂, Z₃ are independently CR₂; Y₁, Y₂ are C; Y₃,     Y₄ are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; W₂,     W₃, W₄ are independently O, S(O)r (r=0-2), CR₄R₄, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; t=1-2; u=1-3; Any one of Z₂, Z₃ must be a carbon     atom to which the remainder of the molecule is attached. -   399. Z₂ is N; Z₁, Z₃, Z₄ are independently CR₂; Y₁, Y₂ are C; Y₃, Y₄     are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; W₂,     W₃, W₄ are independently O, S(O)r (r=0-2), CR₄R₄, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; t=1-2; u=1-3; Any one of Z₁, Z₃, Z₄ must be a carbon     atom to which the remainder of the molecule is attached. -   400. Z₂, Z₃ are N; Z₁, Z₄ are independently CR₂; Y₁, Y₂ are C; Y₃,     Y₄ are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; W₂,     W₃, W₄ are independently O, S(O)r (r=0-2), CR₄R₄, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; t=1-2; u=1-3; Any one of Z₁, Z₄ must be a carbon     atom to which the remainder of the molecule is attached. -   401. Z₂, Z₄ are N; Z₁, Z₃ are independently CR₂; Y₁, Y₂ are C; Y₃,     Y₄ are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; W₂,     W₃, W₄ are independently O, S(O)r (r=0-2), CR₄R₄, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; t=1-2; u=1-3; Any one of Z₁, Z₃ must be a carbon     atom to which the remainder of the molecule is attached. -   402. Z₃ is N; Z₁, Z₂, Z₄ are independently CR₂; Y₁, Y₂ are C; Y₃, Y₄     are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; W₂,     W₃, W₄ are independently O, S(O)r (r=0-2), CR₄R₄, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; t=1-2; u=1-3; Any one Z₁, Z₂, Z₄ of must be a carbon     atom to which the remainder of the molecule is attached. -   403. Z₃, Z₄ are N; Z₁, Z₂ are independently CR₂; Y₁, Y₂ are C; Y₃,     Y₄ are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; W₂,     W₃, W₄ are independently O, S(O)r (r=0-2), CR₄R₄, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; t=1-2; u=1-3; Any one of Z₁, Z₂ must be a carbon     atom to which the remainder of the molecule is attached. -   404. Z₄ is N; Z₁, Z₂, Z₃ are independently CR₂; Y₁, Y₂ are C; Y₃, Y₄     are independently CH, N; W₁ is O, S(O)r (r=0-2), CR₄R₄, N—R₁; W₂,     W₃, W₄ are independently O, S(O)r (r=0-2), CR₄R₄, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; t=1-2; u=1-3; Any one Z₁, Z₂, Z₃ of must be a carbon     atom to which the remainder of the molecule is attached.

The preferred embodiments of formula 15-C:

-   405. Z₁, Z₂, Z₃ are independently CR₂; Y₁, Y₂, Y₄ are C; Y₂ is N;     W₁, W₂, W₄ are independently O, S(O)r (r=0-2), CR₄R₄, N—R₁ with the     proviso that no S—S, S—O or O—O bond formation can occur to form a     saturated ring; t=1-2; u=1-2; Any one Z₁, Z₂, Z₃ of must be a carbon     atom to which the remainder of the molecule is attached. -   406. Z₁ is N; Z₂, Z₃ are independently CR₂; Y₁, Y₂, Y₄ are C; Y₂ is     N; W₁, W₂, W₄ are independently O, S(O)r (r=0-2), CR₄R₄, N—R₁ with     the proviso that no S—S, S—O or O—O bond formation can occur to form     a saturated ring; t=1-2; u=1-2; Any one Z₂, Z₃ of must be a carbon     atom to which the remainder of the molecule is attached. -   407. Z₁, Z₃ are N; Z₃ is CR₂; Y₁, Y₂, Y₄ are C; Y₂ is N; W₁, W₂, W₄     are independently O, S(O)r (r=0-2), CR₄R₄, N—R₁ with the proviso     that no S—S, S—O or O—O bond formation can occur to form a saturated     ring; t=1-2; u=1-2; Z₃ is the carbon atom to which the remainder of     the molecule is attached.

The preferred tricyclic heteroarylgroup A and B are one of the following formulae: 1-A, 1-B, 2-A, 3-B, 4-B, 5-A, 5-B, 6-B, 6-C, 7-B, 8-B, 9-A, 10-A, 12-A, 12-B, 13-B, 14-A, 14-B, and 15-B.

More preferred compounds of the present invention are:

-   1.     (5R,6Z)-6-(Imidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; -   2.     (5R,6Z)-6-[(7-methoxyimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; -   3.     (5R,6Z)-6-[(7-chloroimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; -   4.     (5R),(6Z)-6-Imidazo[1,2-a]quinolin-2-ylmethylene-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; -   5.     (5R),(6Z)-6-(6,7-dihydro-5H-cyclopenta[d]imidazo[2,1-b][1,3]thiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; -   6.     (5R),(6Z)-6-(Imidazo[1,2-a]quinoxaline-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hepto-2-ene-2-carboxylic     acid, sodium salt; -   7.     (5R,6Z)-6-[(7-methylimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; -   8. (5R),     (6Z)-6-(4,5,6,7-tetrahydro-1,3a,3b,8-tetraaza-cyclopenta[a]indene-2-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic     acid sodium salt; -   9.     (5R,6E)-6-[(10-benzyl-1-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-8-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; -   10.     6-(5-ethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacen-2-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; -   11.     (5R,6E&Z)-7-oxo-6-(4H,10H-pyrazolo[5,1-c][1,4]benzoxazepin-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid, sodium salt; -   12. (5R),     (6Z)-6-(5H-Imidazo[2,1-a]isoindol-2-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic     acid sodium salt; -   13.     (5R,6Z)-6-[(5-methylimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; -   14.     (5R,6Z)-6-[(7-fluoroimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; -   15.     (5R),(6Z)-6-(5,8-dihydro-6H-imidazo[2,1-b]pyrano[4,3-d][1,3]thiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; -   16.     (5R),(6Z)-6-(imidazo[2,1-b]bebzothiazol-7-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; -   17.     (5R),(6Z)-7-oxo-6-([1,3]thiazolo[3,2-a]benzimidazol-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; -   18.     (5R),(6Z)-6-(7,8-dihydro-6H-cyclopenta[3,4]pyrazolo[5,1-b][1,3]thiazol-2-ylmethylene)-7-oxo-6-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; -   19.     (5R),(6Z)-7-oxo-6-(5,6,7,8-tetrahydroimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; -   20.     (5R),(6Z)-8-[(9-methyl-9H-imidazo[1,2-a]benzimidazol-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; -   21.     (5R,6Z)-7-oxo-6-(4H-thieno[2′,3′:4,5]thiopyrano[2,3-b]pyridin-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid (Sodium salt); -   22.     (5R,6Z)-6-[(5-methyl-7,8-dihydro-6H-cyclopenta[e][1,2,4]triazolo[1,5-a]pyrimidin-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid, sodium salt; -   23.     (5R,6Z)-6-{[7-(ethoxycarbonyl)-6,7,8,9-tetrahydropyrido[3,4-e][1,2,4]triazolo[1,5-a]pyrimidin-2-yl]methylene}-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid, sodium salt; -   24.     (5R,6Z)-6-(8′,9′-dihydro-6′H-spiro[1,3-dioxolane-2,7′-[1,2,4]triazolo[1,5-a]quinazolin]-2′-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid, sodium salt; -   25.     (5R,6Z)-6-[(5-methyl-6,7,8,9-tetrahydro[1,2,4]triazolo[1,5-a]quinazolin-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid, sodium salt; -   26.     (5R,6Z)-6-[(5-methoxy-7,8-dihydro-6H-cyclopenta[e]imidazo[1,2-a]pyrimidin-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid, sodium salt; -   27.     (5R,6Z)-6-({5-[2-(benzyloxy)ethoxy]-7,8-dihydro-6H-cyclopenta[e]imidazo[1,2-a]pyrimidin-2-yl}methylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid, sodium salt; -   28.     (5R,6Z)-6-(2,3-dihydro[1,3]thiazolo[3,2-a]benzimidazol-6-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid, sodium salt; -   29.     (5R,6Z)-6-(3,4-dihydro-2H-[1,3]thiazino[3,2-a]benzimidazol-7-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid, sodium salt; -   30.     (5R,6Z)-7-oxo-6-([1,3]thiazolo[3,2-a]benzimidazol-6-ylmethylene)₄-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid, sodium salt; -   31.     (5R,6Z)-6-(7,8-dihydro-5H-pyrano[4,3-d]pyrazolo[5,1-b][1,3]oxazol-2-ylmethylene)7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid, sodium salt; -   32.     (5R,6Z)-7-oxo-6-(5,6,7,8-tetrahydropyrazolo[5,1-b][1,3]benzoxazol-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid, sodium salt; and -   33.     (5R,6Z)-6-{[6-(ethoxycarbonyl)-5,6,7,8-tetrahydropyrazolo[5′,1′:2,3][1,3]oxazolo[5,4-c]pyridin-2-yl]methylene}-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid, sodium salt.

Especially preferred compounds of the present invention are:

-   (5R),(6Z)-6-(6,7-dihydro-5H-cyclopenta[d]imidazo[2,1-b][1,3]thiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid; and -   (5R),(6Z)-6-(5,8-dihydro-6H-imidazo[2,1-b]pyrano[4,3-d][1,3]thiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic     acid.

A compound's structural formula includes any tautomers, any stereoisomers (except where stereochemistry is clearly noted) and any crystalline forms.

The compounds according to the present invention have β-lactamase inhibitory and antibacterial properties and are useful for the treatment of infections in humans and animals. It should be noted that the compounds of the present invention, when used in combination with β-lactam antibiotics will result in the increased antibacterial activity (synergistic effect) against class-A and class-C producing organisms. β-Lactam antibiotics include penicillin antibiotics such as piperacillin, amoxycillin, ticarcillin, benzylpenicillins, ampicillin, sulbenicillin, other known penicillins and cephalosporins such as cefatrizine, cephaloridine, cephalothin, cefazolin, cephalexin, cephradine, other known cephalosporins, aztreonam and latamoxef (Moxalactam). Most preferably compounds of this present invention are used with piperacillin, and Amoxicillin which has a broad spectrum of activity against Gram positive and Gram negative pathogens.

The administration of the compounds of the present invention may be provided in conjunction with prior, simultaneous or subsequent administration of β-lactam antibiotic (“co-administration”). By “provided”, it is intended to include direct administration as well as in vivo, e.g. pro-drugs. When the compounds of the present invention are co-administered with a β-lactam antibiotic, the ratio of the amount of the compound to the amount of the β-lactam antibiotic may vary in a wide range. The ratio of β-lactam antibiotic to β-lactamase inhibitor may vary from 1:1 to 100:1. Preferably the ratio of the β-lactam antibiotic to the β-lactamase inhibitor is less than 10:1. The composition of the present invention may be in a form suitable for oral (PO), intravenous (IV) or topical administration. The compositions of the invention may be in a form of tablets, capsules, creams, syrups, suspension, sterile solutions suitable for injection or infusion. Preferably, the compounds of the present invention are co-administered with piperacillin intravenously or Amoxicillin orally or intravenously.

IC₅₀ Determination for the Penem Inhibitor

β-Lactamase inhibitory activity of the penem inhibitors was determined spectrophotometrically as described by Bush et al., [Bush, K., Macalintal, C., Rasmussen, B. A., Lee, V. and Yang, Y. Antimicrobial Agents and Chemotherapy 1993, 37, 851]. Homogeneously purified class A β-lactamases TEM-1 from E. coli and 1 ml-1 from Enterobacter cloacae, class B enzyme CcrA from Bacteroides fragilis and class C enzyme AmpC from Enterobacter cloaca were employed in the assay. The enzyme concentrations for TEM-1, Imi-1, CcrA and AmpC were 4.3, 7.1, 1.2 and 2.1 nM, respectively. A wide range of inhibitor concentrations were prepared in 50 mM PO₄, pH 7.0 to include the possible IC₅₀ values. The substrate used to initiate the enzyme reaction was nitrocefin at 50 μg/ml in the same buffer as the inhibitor. Initially the enzyme and inhibitor (20 μl each) were preincubated for 10 minutes at 25° C. prior to the addition of 160 μl volume of nitrocefin. Initial rates of hydrolysis were monitored for 5 minutes at 495 nm using a Molecular Devices Spectra Max 250 with kinetic protocol of SoftMax Program. Readings from the Spectra Max 250 were exported and transferred to Microsoft Excel. The percent of inhibition of each inhibitor concentration was calculated based on the control enzyme activity. The inhibitor concentration that caused a 50% reduction in the enzymatic activity (IC₅₀) was determined graphically. TABLE 1 β-Lactamase Inhibition Data IC50 (nM) Class A Class B Class C Compound TEM-1 Imi Ccr AmpC Example 1 10 160 350 1.4 Example 2 18 180 250 2.4 Example 3 5.6 22 74 3.2 Example 4 6 90 900 2.1 Example 5 1.4 72 240 2.1 Example 6 2.5 210 350 1.2 Example 7 2.6 106 103 1.1 Example 8 2.4 15 450 1.4 Example 9 3.5 3600 220 4.5 Example 10 48 35 140 5.8 Example 11 1.4 78 62 3.6 Example 12 2.6 6.4 42 .28 Example 13 8.7 102 228 1.6 Example 14 8.1 270 370 2.4 Example 15 2.8 100 200 1.5 Example 16 4.5 70 130 9.5 Example 17 ND ND ND ND Example 18 ND ND ND ND Example 19 1.9 33 215 0.62 Example 20 ND ND ND ND Example 21 11 580 210 3.7 Example 22 ND ND ND ND Example 23 ND ND ND ND Example 24 ND ND ND ND Example 25 ND ND ND ND Example 26 48 63 420 10 Example 27 12 33 180 3 Example 28 3.2 90 110 5.7 Example 29 15 300 240 18 Example 30 46 200 97 9.3 Example 31 4.3 140 130 4 Example 32 2.6 110 180 5.6 Example 33 10 360 160 140 ND = NOT DETERMINED

Antimicrobial susceptibility testing. The in vitro activities of the antibiotics were determined by the microbroth dilution method as recommended by the National Committee for Clinical Laboratory Standards (NCCLS). (NCCLS. 2000. Methods for Dilution Antimicrobial Susceptibility Tests for Bacteria That Grow Aerobically; Approved Standards: M7-A5, vol. 19. National Committe for Clinical Laboratory Standards, Villanova, Pa.). Mueller-Hinton II broth (MHBII)(BBL Cockeysville, Md.), was used for the testing procedure. Microtiter plates containing 50 μl per well of two-fold serial dilutions of piperacillin combined with a constant amount (4 ug/ml) of a B-lactamase inhibitor (final concentration) were inoculated with 50 μl of inoculum to yield the appropriate density (10⁵ CFU/ml) in 100 μl. The plates were incubated for 18-22 hours at 35° C. in ambient air. The minimal inhibitory concentration (MIC) for all isolates was defined as the lowest concentration of antimicrobial agent that completely inhibits the growth of the organism as detected by the unaided eye. The MIC data obtained by the above said procedure are listed in Table 2. TABLE 2 Minimal Inhibitory Concentration (μg/ml) Data: Inc: 35° C. for 18 hours E. Coli E. Coli E. Coli E. Cloacae P. aeruginos S. Marcescens E. Coli GC2847 GC2920 GC2894 GC1477 GC1764 GC1781 E. Coli S. aureus Example GC2844 (TEM-1) (IRT-2) (Ampc) (Ampc) (Ampc) Sme-1 + Ampc GC2203 GC2216 1 2 2 2 1 4 8 0.5 2 <0.06 2 2 16 2 1 64 16 2 1 <0.06 3 2 4 1 2 16 8 1 1 <0.06 4 2 4 2 4 32 8 0.5 2 <0.06 5 2 4 2 2 16 1 0.5 2 <0.06 6 1 2 0.25 16 16 16 1 0.25 <0.06 7 2 4 2 4 32 16 0.5 1 <0.06 8 2 8 2 2 64 32 0.5 1 <0.06 9 1 64 2 >64 >64 >64 8 1 0.5 10 2 >64 2 32 >64 64 4 1 <0.06 11 1 8 1 4 32 16 1 1 <0.06 12 2 4 4 4 32 64 1 2 <0.06 13 2 8 2 8 32 2 4 2 ND 14 2 8 2 8 32 4 2 2 ND 15 2 4 2 2 16 4 1 2 0.05 16 2 64 2 32 >64 32 1 4 0.05 17 2 64 4 >64 >64 32 8 2 ND 18 2 >64 4 >64 >64 64 4 4 ND 19 2 8 2 4 32 1 8 2 .06 20 4 >64 4 32 >64 32 2 2 ND 21 2 >64 4 32 >64 64 2 2 ND 22 2 16 4 64 >64 64 4 2 ND 23 2 64 2 >64 >64 64 4 2 ND 24 2 64 4 >64 >64 64 8 4 ND 25 2 64 4 >64 64 64 8 4 ND 26 2 8 2 16 32 8 2 4 ND 27 2 >64 4 64 >64 64 >64 2 ND 28 2 64 4 32 >64 64 2 2 ND 29 2 64 4 32 >64 64 2 64 ND 30 2 64 8 32 >64 1 32 2 ND 31 2 32 2 16 64 32 2 4 ND 32 2 16 4 32 64 64 2 2 .05 33 2 64 4 64 >64 >64 2 2 ND ND = NOT DETERMINED

In Vivo Antibacterial Protection

Materials:

Animals:

Female mice strain CD-1, approximately 18-22 grams, were received from Charles River Laboratories and quarantined 7 days prior to use. In addition, mice may be rendered neutropenic using cytoxan for particular studies.

Infections:

Clinical isolates that have been adapted to cause infection in mice, are used in the experiment, including infections with strains of E. coli, K. pneumoniae, M. morganii, E. cloacae, S. marcescens, C. freundii, staphylococci, streptococci, P. aeruginosa and N. gonorrhoeae.

PREPARATION: Animals are housed five to a cage with free access to food and water, in accordance with NIH guidelines.

EXPERIMENTAL PROTOCOL

Mice are challenged by injecting 0.5 ml intraperitoneally or 0.05 ml intranasally of a predetermined bacterial inoculum suspended in broth, saline or hog gastric mucin (supplemented with dried bovine hemoglobin for N. gonorrhoeae). The bacterial inoculum is equivalent to 10-100 LD₅₀s of the specific infecting strain and will result in death of the non-treated control animals within 7 days: “Bacterial Virulence in Mice”. Antibacterial doses (dose concentration prepared by two fold serial dilutions of the antibiotic) are dissolved or suspended in 0.2% aqueous agar or methocel, phosphate buffered saline or an adjuvant are administered orally, subcutaneously or intravenously in the following manner:

-   -   a) Orally or subcutaneously: Dose volume of 0.5 ml administered         ½ hr after infection. A second dose may be administered 3 hr.         after infection for treatment of infections with more virulent         organisms.     -   b) Intravenously: Dose volume of 0.2 ml, administered ½ hr.         after infection.

For the treatment of infections with more virulent organisms, more doses, up to 48 hr may be administered. (Intravenous dosing will not exceed 3 doses/24 hr period.)

-   -   c) Oral pretreatment: Under special circumstances, the pH of the         stomach needs to be adjusted in order to increase the gastric         stability of the antibiotic. For this purpose, 0.5 ml of         phosphate buffered saline (pH7.8, 0.06M) (or specific approved         adjuvant) is administered orally ½ hr after infection, followed         5 minutes later by 0.5 ml of antibiotic (also orally) contained         in phosphate buffered saline (pH7.8, 0.06M).         Animal Species

A detailed explanation as to the number of animals needed for the determination of in vivo efficacy follows:

-   A) Novel antibiotics are tested at 5 different dose levels with 5     mice per dose level at each of three routes of administration (oral,     subcutaneous and intravenous). Initially the three routes of     administration should be investigated so as to determine if the drug     is orally absorbed and/or which is the most effective route. This     would require 25 mice/route with 3 routes/antibiotic or 75 mice per     novel compound tested. One to two novel antibiotics will be tested     per experiment (75-150 mice) -   B) The effectiveness of the new compound must be compared to that of     a standard, or antibiotic of known effectiveness. Known or     previously tested antibiotics are tested at 5 dose levels with 5     mice per dose level by a single route of administration, for a total     of 25 mice/antibiotic. Usually 3-6 antibiotics will be tested per     experiment. (75-150 mice). -   C) Untreated controls—In each of the above tests, untreated animals     are infected with 3 different concentrations of bacterial inoculum     with 10 mice per concentration (30 mice total in each and every     test). These untreated controls are used to determine and maintain     the infection level between 10-100 LD50s as required for test to     test comparison and validity.     Determination of Protective Effects of Antibacterial Agents:

The protective effects of the antibacterial agent(s) are measured by the survival of the infected untreated as compared to the treated animals. For this determination, animals are observed for 7 days after treatment. A census of survivors is taken twice daily and at that time dead as well as moribund animals are removed. The 7 day survival ratio from three separate tests are pooled for estimation of median effective dose (ED50) by computerized program for probit analysis (Cleeland, R. and E Squires. 1991. Evaluation of New Antimicrobials in Vitro and in Experimental Animal Infections. In Antibiotics in Laboratory Medicine”, 3rd. ed., edited by Victor Lorian. Williams and Wilkins Baltimore, Md. pp. 752-783). The test is performed three times on separate days to provide a statistically valid number of animals and to minimize variation in test results on a day to day and test to test basis. TABLE 3 Example ED₅₀ mg/kg Ratio of Piperacillin Inhibitor 1 32-64 2:1 2 >64 2:1 3 32-64 4:1 4 32-64 2:1 5 19.5 4:1 6 NT 7 137 4:1 8 16-64 4:1 9 NT 10 55.6 4:1 11 NT 12 50 4:1 13 ND 14 >64 15 25 16 ND 17 ND 18 ND 19 63 20 ND 21 ND 22 ND 23 ND 24 ND 25 ND 26 ND 27 ND 28 ND 29 ND 30 ND 31 ND 32 ND 33 ND

Compounds of the general formula I can be prepared by a novel, mild and a facile way, by condensing an appropriately substituted aldehyde 4 with a 6-bromo-penem derivative of structure 1 (Scheme 1) in the presence of anhydrous MgBr₂ or MgBr₂: etherate and a base such as triethylamine, DMAP or DBU, preferably at −20° C. to −40° C. The intermediate aldol product 5 can be functionalized with acid chlorides or anhydrides to an acetate, triflate or a tosylate 6. Compound 6 can be smoothly converted to the desired product by a reductive elimination process using a metal such as activated zinc and phosphate buffer at 20° C. to 35° C. at a pH of 6.5 to 8.0. If the protecting group on the carboxylate oxygen is a para-nitrobenzyl substitiuent then the reductive elimination and deprotection can be achieved by a single step. However, if the protecting group is other than a para-nitrobenzyl substituent, a two step

-   -   procedure can be followed depending up on the nature of the         protecting group. In an alternate procedure, the intermediate 6         can be hydrogenated at 40 Psi pressure in the presence of 10%         Pd/C. The product can be isolated as a free acid or as an alkali         metal salt. The above mentioned two step procedure can be         carried out in one step by carrying out the entire process         without isolating the intermediate 6. This is a very general,         relatively simple and efficient procedure in terms of yield and         economic feasibility. This procedure can be adopted to large         scale synthesis and is amenable to a variety of aldehydes. The         above mentioned aldol condensation reaction is very versatile         and it can be applied to any bromopenem derivative, where the         carboxy group is protected other than 4-nitrobenzyl moiety.         Example of other protecting group include benzyl, para-methoxy         benzyl derivative, benzyhydrol, trityl, alkyl and allyl         derivatives. However, when the protecting group is other than         4-nitrobenzyl group, a separate deprotection step need to be         carried out after the reductive elimination procerdure. The         chemistry involved in the deprotection step is well known to         people who are skilled in that art.

The required aldehydes 4 for the above mentioned transformations can be prepared from their respective alcohol derivatives by MnO₂ oxidation or by Swern oxidation. In some cases the required aldehyde functionality can be introduced directly in the heterocyclic moiety by a Vilsmier Haack reaction using DMF/POCl₃. The aldehydes required for the present investigation may be prepared as depicted in Schemes 2 to 8. This procedure can be adopted to any system where there is an amino functionality adjacent to the —N=system. For example, the aldehyde required to synthesize compound in Example 12, was prepared starting from 2-aminophenyl acetonitrile (Scheme 6).

2-Amino-condensed thiazole ring systems (Exemplified with the preparation of ethyl6,7-dihydro-5H-cyclopenta[d]imidazo[2,1-b]thiazole-2-carboxylate, Example 5) can be prepared by reacting cyclic α-halo ketones with thiourea. Scheme 7)

The aldehyde required to prepare example 10, can be synthesized by following the procedure outlined in Scheme 8. This procedure can be adopted to prepare a variety of condensed tricyclic imidazolo pyrimidine ring systems. The other examples that are enlisted here Examples 13 to 33 were prepared by the route enlisted in

Experimentals Example 1 Preparation of (5R,6Z)-6-(Imidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid.

Step 1: Ethyl imidazo[2,1-b]-benzthiazole-2-carboxylate:

Ethyl bromopyruvate (9.8 g, 50 mmol) was added dropwise to a stirred solution of 2-aminobenzothiazole (7.5 g, 50 mmol) in DMF (100 ml) at room temperature. After the addition, the reaction mixture was heated to reflux for 6 h. The reaction mixture was cooled to room temperature and quenched with ice cold water. The aqueous layer was neutralized with NH₄OH and the separated solid was fitered. It was washed well with water and dried. The crude product obtained was taken to next step without purification.

Brown solid; Yield: 10 g, 81%; M+H 248. mp 97° C.

Step 2: Imidazo[2,1-b]-benzthiazole-2-methanol:

To a stirred slurry of LiAlH₄ (2.0 g, excess) in dry THF, ethyl imidazo[2,1-b]-benzthiazole-2-carboxylate (4.9 g, 20 mmol) was slowly added in THF (100 ml) at 0° C. After the addition, the reaction mixture was stirred at room temperature for 1 h and quenched with saturated NH₄Cl/NH₄OH. The separated solid was diluted with Chloroform/MeOH (3:1) and filtered through a pad of celite. The organic layer was washed once with saturated NaCl and dried over anhydrous MgSO₄. It was filtered and concentrated. The brown solid obtained was taken to next step with out purification. Yield: 3.8 g, 93%; M+H 205; mp 131° C.

Step 3: 2-Formyl-Imidazo[2,1-b]-benzthiazole:

To a stirred solution of imidazo[2,1-b]-benzthiazole-2-methanol (2.04 g, 10 mmol) in methylene chloride (200 ml), activated MnO₂ (15 g, excess) was added. The reaction mixture was stirred at room temperature for 24 h and filtered through a pad of celite. The reaction mixture was concentrated and the product was purified by silica gel column chromatography by eluting it with 75% ethyl acetate; hexane. Brown solid; Yield: 800 mg, 40%; M+H 203.

Step 4: 4-Nitrobenzyl-6-[(acetyloxy) (imidazo[2,1-b][3]benzothiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate:

2-Formyl-Imidazo[2,1-b]-benzthiazole (444 mg, 2.2 mmol) and a dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (772 mg, 2 mmol) were added successively to a dry acetonitrile (15 mL) solution of anhydrous MgBr₂:etherate (619 mg 2.4 mmol) under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to a silica gel column, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereo isomers were taken to the next step. Pale yellow amorphous solid; Yield: 850 mg, 67%; mp 69° C.; M+H 630

Step 5: (5R),(6Z)-6-(Imidazo[1,2-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo [3.2.0]hept-2-ene-2-carboxylic acid:

4-Nitrobenzyl-6-[(acetyloxy) (imidazo[2,1-b][1,3]benzothiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (500 mg, 0.79 mmol) was dissolved in THF (17 mL) and acetonitrile (36 mL). Freshly activated Zn dust (5.2 g) was added rapidly with 0.5 M phosphate buffer (pH 6.5, 28 mL). The reaction vessel was covered with foil to exclude light. The reaction mixture was vigorously stirred for 2 h at room temperature. The reaction mixture was filtered, cooled to 3° C., and 1 N NaOH was added to adjust the pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give a yellow precipitate. The precipitate was dissolved in acetonitrile and loaded on a HP-21 reverse phase column. It was eluted with deionized water (2 L) and latter eluted with 10% acetonitrile:water. Yield: 105 mg, 35%; as yellow crystals; mp 233° C.; M+H 356.

¹H NMR (DMSO-d₆) δ 6.51(s, 1H), 6.53(s, 1H), 7.09(s, 1H), 7.47(t, 1H, J=7.5 Hz), 7.54(t, 1H, J=7.5 Hz), 8,06(t, 1H), 8.62(s, 1H).

Example 2 Preparation of (5R,6Z)-6-[(7-methoxyimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid.

Step 1: Ethyl 7-methoxyimidazo[2,1-b]-benzthiazole-2-carboxylate:

Ethyl 7-methoxyimidazo[2,1-b]-benzthiazole-2-carboxylate was prepared according to the procedure as outlined in Example 1, (Step 1). Starting from 6-methoxy-2-amino benzothiazole (27 g, 0.15 mol) and ethyl bromopyruvate (39.9 g, 0.2 mol), 24 g (43% Yield) of ethyl 7-methoxyimidazo[2,1-b]-benzthiazole-2-carboxylate was isolated as a brown solid. (M+H) 277.

Step 2: 7-methoxy imidazo[2,1-b]-benzthiazole-2-methanol:

7-methoxy imidazo[2,1-b]-benzthiazole-2-methanol was prepared according to the procedure outlined in Example 1, (Step 2). Starting from ethyl 7-methoxyimidazo[2,1-b]-benzthiazole-2-carboxylate (12.5 g, 43.5 mmol) and LiAlH₄ solution (43.5 ml, 0.5 M solution in THF), 4.0 g (40% yield) of the alcohol derivative was isolated as a brown solid. (M+H) 235.

Step 3: 2-Formyl-7-methoxyimidazo[2,1-b]-benzthiazole:

2-Formyl-7-methoxyimidazo[2,1-b]-benzthiazole was prepared according to the procedure outlined in Example 1, (Step 3). Starting from 7-methoxy imidazo[2,1-b]-benzthiazole-2-methanol (4.0 g 17 mmol) in methylene chloride/DMF (300 mL: 50 mL) and active MnO₂ (12 g, excess), 822 mg (21% Yield) of the aldehyde derivative was isolated as brown solid. (M+H) 233.

Step 4: 4-Nitrobenzyl-6-[(acetyloxy) (7-methoxyimidazo[2,1-b][1,3]benzothiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate:

2-Formyl-7-methoxyimidazo[2,1-b]-benzthiazole (822 mg, 3.5 mmol) and the dry THF solution (40 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (1.364, 3.54 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂:etherate (1.3 g, 5 mmol) under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to a silica gel column, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereo isomers were taken to next step. Pale yellow amorphous solid; Yield: 2.24 g, 95%; M+H 660.

Step 5: (5R),(6Z)-6-[(7-methoxyimidazo[1,2-b][1,3]benzothiazol-2-ylmethylene)]-7-oxo-4-thia-1-azabicyclo [3.2.0]hept-2-ene-2-carboxylic acid:

4-Nitrobenzyl-6-[(acetyloxy) (7-methoxyimidazo[2,1-b][1,3]benzothiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (659 mg, 1.0 mmol) was dissolved in THF (17 mL) and acetonitrile (36 mL). Freshly activated Zn dust (5.2 g) was added rapidly with 0.5 M phosphate buffer (pH 6.5, 28 mL). The reaction vessel was covered with foil to exclude light. The reaction mixture was vigorously stirred for 2 h at room temperature. The reaction mixture was filtered, cooled to 3° C., and 1 N NaOH was added to adjust pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give yellow precipitate. The precipitate was filtered and washed with H₂O, MeCN, acetone to give the title compound. Yield: 68 mg, 23%; as yellow crystals; mp 284; M+H 386.

¹H NMR (DMSO-d₆) δ 3.89 (s, 3H), 6.58(s, 1H), 6.64(s, 1H), 7.14(s, 1H), 7.2(dd, 1H, J=6.0 Hz), 7.75(d, 1H, J=3.0 Hz), 8,03(d, J=6.0 Hz 1H), 8.62(s, 1H).

Example 3 Preparation of (5R,6Z)-6-[(7-chloroimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

Step 1: Ethyl 7-chloroimidazo[2,1-b]-benzthiazole-2-carboxylate:

Ethyl 7-chloroimidazo[2,1-b]-benzthiazole-2-carboxylate was prepared according to the procedure as outlined in Example 1, (Step 1). Starting from 6-chloro-2-amino benzothiazole (9.2 g, 50 mmol) and ethyl bromopyruvate (11.6 g, 60 mmol), 8.5 g (60% Yield) of ethyl 7-chloroimidazo[2,1-b]-benzthiazole-2-carboxylate was isolated as brown solid. (M+H) 281.

Step 2: 7-chloroimidazo[2,1-b]-benzthiazole-2-methanol:

7-chloro imidazo[2,1-b]-benzthiazole-2-methanol was prepared according to the procedure outlined in Example 1, (Step 2). Starting from ethyl 7-chloroimidazo[2,1-b]-benzthiazole-2-carboxylate (9.0 g, 32.1 mmol) and LiAlH₄ (4.0 g, excess), 5.5 g (72% yield) of the alcohol derivative was isolated as brown solid. mp 166° C. (M+H) 239.

Step 3: 2-Formyl-7-chloroimidazo[2,1-b]-benzthiazole:

2-Formyl-7-chloroimidazo[2,1-b]-benzthiazole was prepared according to the procedure outlined in Example 1, (Step 3). Starting from 7-chloroimidazo[2,1-b]-benzthiazole-2-methanol (4.0 g 16.8 mmol) in methylene chloride/MeOH (300 mL: 50 mL) and active MnO₂ (20 g, excess), 2.2 g (55% yield) of the aldehyde derivative was isolated as brown solid. (M+H) 236.

Step 4: 4-Nitrobenzyl-6-[(acetyloxy) (7-chloroimidazo[2,1-b][1,3]benzothiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate:

2-Formyl-7-chloroimidazo[2,1-b]-benzthiazole (270 mg, 1.14 mmol) and the dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (500 mg, 1.14 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂: O(Et)₂ (390 mg, 1.5 mmol)under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereomers were taken to the next step. Pale yellow amorphous solid; Yield: 495 mg, 65%; M+H 665.

Step 5: (5R),(6Z)-6-[(7-chloroimidazo[1,2-b][1.3]benzothiazol-2-ylmethylene)]-7-oxo-4-thia-1-azabicyclo [3.2.0]hept-2-ene-2-carboxylic acid:

4-Nitrobenzyl-6-[(acetyloxy)(7-chloroimidazo[2,1-b][1,3]benzothiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (450 mg, 0.67 mmol) was dissolved in THF (20 mL) and acetonitrile (10 mL). Freshly activated Zn dust (5.2 g) was added rapidly with 0.5 M phosphate buffer (pH 6.5, 28 mL). The reaction vessel was covered with foil to exclude light. The reaction mixture was vigorously stirred for 2 h at room temperature. The reaction mixture was filtered, cooled to 3° C., and 0.1 N NaOH was added to adjust the pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give a yellow precipitate. The product was purified by HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 L) and latter with 10% acetonitrile:water. The fractions containing the product were collected and concentrated under reduced pressure at room temperature. The yellow solid was washed with acetone, filtered and dried. Yield: 80 mg, 18%; as yellow crystals; mp 240° C.; (M+H+Na) 412.

¹H NMR (DMSO-d₆) δ 6.6 (s, 2H), 7.1 (s, 1H), 7.62 (dd, 1H), 8.11 (d, 1H), 8.2 (s, 1H), 8.6 (s, 1H).

Example 4 Preparation of (5R),(6Z)-6-Imidazo[1,2-a]quinolin-2-ylmethylene-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid Imidazo[1,2-a]quinoline-2-carbaldehyde

Imidazo[1,2-a]quinoline-2-carbaldehyde was prepared by the method of Westwood and co-workers (J. Med. Chem. 1988, 31, 1098-1115).

Step 1: (5R, 6RS)-6-[(RS)-Acetoxyimidazo[1,2-a]quinolin-2-ylmethyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitrobenzyl ester:

Imidazo[1,2-a]quinoline-2-carbaldehyde (1.09 g) and a dry THF solution (75.5 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (2.22 g) were added successively to a dry acetonitrile (75.5 mL) solution of anhydrous MgBr₂ (2.5 g) under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (1.85 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to a silica gel column, then the column was eluted with CHCl₃-acetone(1/0˜95/5). Collected fractions were concentrated under reduced pressure followed by recrystallization from CHCl₃-Et₂O to give the title compound as one isomer. (pale yellow crystals, yield: 1.3 g, 38%).

¹H NMR (CDCl₃) δ 2.37(s, 3H), 5.29(d, 1H, J=13.5 Hz), 5.45(d, 1H, J=13.5 Hz), 6.22(s, 1H), 7.14(s, 1H), 7.46˜7.52(m, 3H), 7.56(d, 1H, J=9.6 Hz), 7.62(d, 2H, J=8.6 Hz), 7.64˜7.69(m, 1H), 7.83(dd, 1H, J=1.1, 7.9 Hz), 7.93(d, 1H, J=8.3 Hz), 7.99(s, 1H), 8.25(d, 2H, J=8.6 Hz).

Step 2: (5R),(6Z)-6-Imidazo[1,2-a]quinolin-2-ylmethylene-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid:

(5R,6RS)-6-[(RS)-Acetoxyimidazo[1,2-a]quinolin-2-ylmethyl]-6-bromo-7-,oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitrobenzyl ester (1.3 g) was dissolved in THF (17 mL) and acetonitrile (36 mL). Freshly activated Zn dust (5.2 g) was added rapidly with 0.5 M phosphate buffer (pH 6.5, 28 mL). The reaction vessel was covered with foil to exclude light. The reaction mixture was vigorously stirred for 2 h at room temperature. The reaction mixture was filtered, cooled to 3° C., and 1 N NaOH was added to adjust the pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give a yellow precipitate. The precipitate was filtered and washed with H₂O, acetonitrile, and acetone to give the title compound, yield 297 mg, 38%, as yellow crystals mp 205° C.

¹H NMR (D₂O) d 6.19(s, 1H), 6.36 (s, 1H), 6.87 (s, 1H), 6.96 (d, 1H, J=9.5 Hz), 7.32 (d, 1H, J=9.5 Hz), 7.33 (s, 1H), 7.44˜7.57 m, 4H).

Example 5 Preparation of (5R),(6Z)-6-(6,7-dihydro-5H-cyclopenta[d]imidazo[2,1-b][1,3]thiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

Step 1: Preparation of ethyl 6,7-dihydro-5H-cyclopenta[d]imidazo[2,1-b][1,3]thiazole-2-carboxylate.

A mixture of 2-chlorocyclopentanone (11.8 g, 100 mmol) and thiourea (8.0 g 101 mmol) was refluxed in ethanol: THF (1:2) for 16 hrs. The reaction mixture was cooled to room temperature and the separated white solid was filtered. (9.0 g separated) This was dissolved in anhydrous ethanol (100 ml) and sodium methoxide (2.7 g, 51 mmol). To this ethyl bromopyruvate (10.0 g) was added and stirred at room temperature for 2 hrs. Then it was refluxed for 48 hrs. At the end reaction mixture was cooled to room temperature and concentrated. The residue was extracted with chloroform and washed well with water. The product was purified by silica-gel column chromatography by eluting it with 50% ethyl acetae: hexane. Red semi-solid; Yield: 3.0 g; M+H 237.

The ester was reduced with LiAlH₄ and the resultant alcohol was oxidized with active MnO₂. The aldehyde obtained was taken to next step.

Step 3: Preparation of 4-nitrobenzyl (5R)-6-[(acetyloxy)(6,7-dihydro-5H-cyclopenta[d]imidazo[2,1-b][1,3]thiazol-2-yl)-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate:

2-Formyl-6,7-dihydro-5H-cyclopenta[d]imidazo[2,1-b][1,3]thiazole (600 mg, 3.1 mmol) and the dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (1.2 g, 3 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂: O(Et)₂ (1.2 g, 3.0 mmol)under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereomers were taken to the next step. Pale yellow amorphous solid; Yield: 850 mg, 45%; M+H 620.

Step 4: Preparation of (5R),(6Z)-6-(6,7-dihydro-5H-cyclopenta[d]imidazo[2,1-b][1,3]thiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

4-nitrobenzyl (5R)-6-[(acetyloxy)(6,7-dihydro-5H-cyclopenta[d]imidazo[2,1-b][1,3]thiazol-2-yl)-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (850 mg, 1.37 mmol) was dissolved in THF (20 mL) and acetonitrile (10 mL). Freshly activated Zn dust (5.2 g) was added rapidly with 0.5 M phosphate buffer (pH 6.5, 28 mL). The reaction vessel was covered with foil to exclude light. The reaction mixture was vigorously stirred for 2 h at room temperature. The reaction mixture was filtered, cooled to 3° C., and 0.1 N NaOH was added to adjust the pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give a yellow precipitate. The product was purified by HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 L) and latter with 10% acetonitrile:water. The fractions containing the product were collected and concentrated under reduced pressure at room temperature. The yellow solid was washed with acetone, filtered and dried. Yield: 138 mg, 29%; as yellow crystals; mp 192° C.; (M+H+Na) 367. ¹H NMR (DMSO-d₆) δ 2.51 (m, 4H), 3.01 (m, 2H), 8.2 (s, 1H), 7.1 (s, 1H), 6.55 (s, 1H), 6.4 (s, 1H).

Example 6 Preparation of (5R),(6Z)-6-(Imidazo[1,2-a]quinoxaline-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hepto-2-ene-2-carboxylic acid, sodium salt Imidazo[1,2-a]quinoxaline-2-carboxaldehyde

Imidazo[1,2-a]quinoxaline-2-carboxaldehyde was prepared by the method of Westwood and co-workers (J. Med. Chem. 1998, 31, 1098-1115).

Step 1: (5R, 6RS)-6-((RS)-Acetoxy imidazo[1,2-a]quinoxalin-2-ylmethyl)-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid p-nitrobenzyl ester:

A dry acetonitrile (33 mL) solution of imidazo[1,2-a]quinoxaline-2-carboxaldehyde (505 mg) was added to a dry acetonitrile (20 mL) solution of MgBr₂ (1.1 g) under an nitrogen atmosphere at room temperature, and the mixture was stirred for 10 min. After addition of the dry THF (25 mL) solution of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (931 mg), the mixture was cooled to −20° C. then triethylamine (0.8 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 4 h at −20° C. and treated with 4,4-dimethylamino pyridine (58 mg) and acetic anhydride (0.44 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 16 h at 0° C. 10% Citric acid aqueous solution (200 mL) was added to the reaction mixture and the aqueous layer was extracted with ethyl acetate (3×100 mL). The organic layer was washed with water, saturated sodium hydrogen carbonate and brine, dried (MgSO₄) and filtered. The filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography, eluted with CH₂Cl₂—acetone (50:1), and the title compound was obtained as a diastereomeric mixture (78:22, pale brown foamy amorphous, 1.0 g, 68.9%).

¹H NMR (CDCl₃) δ 2.07 (s, 0.66H), 2.38 (s, 2.34H), 5.30 (d, 1H, J=13.5 Hz), 5.45 (d, 0.78H, J=13.5 Hz), 5.48 (d, 0.22H, J=13.5 Hz), 6.24 (s, 0.78H), 6.46 (s, 0.22H), 6.63 (s, 0.22H), 7.18 (s, 0.78H), 7.50 (s, 0.78H), 7.52 (s, 0.22H), 7.61 (d, 1.56H, J=8.7 Hz), 7.63 (d, 0.44H, J=8.8 Hz), 7.64-7.67 (m, 1H), 7.68-7.73 (m, 1H), 7.92-7.95 (m, 1H), 8.08 (s, 0.78H), 8.13-8.16 (m, 1H), 8.24 (d, 1.56H, J=8.7 Hz), 8.25 (d, 0.44H, J=8.8 Hz), 8.33 (s, 0.22H), 9.05 (s, 0.78H), 9.09 (s, 0.22H).

Step 2: (5R),(6Z)-6-(Imidazo[1,2-a]quinoxaline-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hepto-2-ene-2-carboxylic acid, sodium salt:

(5R, 6RS)-6-((RS)-Acetoxy imidazo[1,2-a]quinoxalin-2-ylmethyl)-6-bromo-7-oxo-4-thia-1-azabicyclo [3.2.0]hept-2-ene-2-carboxylic acid p-nitrobenzyl ester (951 mg) and 10% Pd—C (50% wet, 477 mg) were added to a mixture of THF (48 mL) and 0.5 mol/L phosphate buffer (pH 6.5, 48 mL). The mixture was hydrogenated at 400 kPa at room temperature for 4 h. The reaction solution was filtered and Pd—C was washed with water and n-butanol. The reaction mixture was cooled to 0° C. and 1 N NaOH was added to adjust the ph to 8.5. The aqueous layer was separated and then the organic layer was extracted with water. The combined aqueous layer was concentrated to 57 g and applied to Diaion HP-21 resin (60 mL, Mitsubishi Kasei Co. Ltd.) column chromatography. After adsorbing, the column was eluted with water and then 5, 10, 15 and 20% acetonitrile:water solution (each 60 mL). The combined fractions were concentrated under high vacuum at 35° C. and lyophilized to give the title compound as a yellow amorphous solid, yield 148 mg (26.1%), mp 300° C. (dec). ¹H NMR (D₂O) δ 5.92 (s, 1H), 6.23 (s, 1H), 6.66 (s, 1H), 7.11-7.22 (m, 3H), 7.25 (d, 1H, J=7.9 Hz), 7.50 (s, 1H), 8.03 (s, 1H); IR (KBr) 3413, 1748, 1592, 1553 cm⁻¹; I^(max) (H₂O) 340, 293, 237, 218 nm.

Example 7 Preparation of (5R,6Z)-6-[(7-methylimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

Step 1: Ethyl 7-methylimidazo[2,1-b]-benzthiazole-2-carboxylate:

Ethyl 7-methylimidazo[2,1-b]-benzthiazole-2-carboxylate was prepared according to the procedure as outlined in Example 1, (Step 1). Starting from 6-methyl-2-amino benzothiazole (3.2 g, 20 mmol) and ethyl bromopyruvate (4.0 g, 20.4 mmol), 3.0 g (57% Yield) of ethyl 7-methylimidazo[2,1-b]-benzthiazole-2-carboxylate was isolated as brown solid. (M+H) 261.

Step 2: 2-Formyl-7-methylimidazo[2,1-b]-benzthiazole:

To a stirred solution of Ethyl 7-methylimidazo[2,1-b]-benzthiazole-2-carboxylate (4.0 g, 15.38 mmol) in dry THF at −78° C., DIBAL (1M. solution in toluene) (16.0 ml, 16 mmol) was added. The reaction mixture was stirred at −78° C. and slowly elevated to room temperature. The reaction mixture was stirred at room temperature for 30 minutes and quenched with saturated NH₄Cl. The reaction mixture was extracted with chloroform and washed well with water. The organic layer was dried over anhydrous MgSO₄; filtered and concentrated. The residue was purified bt SiO₂ column chromatography by eluting it with chloroform: metrhanol (20:1). Brown solid; (M+H) 217; Yield: 800 mg (24%)

Step 3: 4-Nitrobenzyl-6-[(acetyloxy) (7-methylimidazo[2,1-b][1,3]benzothiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate:

2-Formyl-7-methylimidazo[2,1-b]-benzthiazole (432 mg, 2.0 mmol) and the dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (772 mg, 2.0 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂: O(Et)₂ (566 mg, 2.0 mmol) under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereomers were taken to the next step. Pale yellow amorphous solid; Yield: 400 mg, 31%; M+H 645.

Step 4: (5R),(6Z)-6-[(7-methylimidazo[1,2-b[1,3]benzothiazol-2-ylmethylene)]-7-oxo-4-thia-1-azabicyclo [3.2.0]hept-2-ene-2-carboxylic acid:

4-Nitrobenzyl-6-[(acetyloxy)(7-methylimidazo[2,1-b][1,3]benzothiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (350 mg, 0.54 mmol) was dissolved in THF (20 mL) and acetonitrile (10 mL). Freshly activated Zn dust (5.2 g) was added rapidly with 0.5 M phosphate buffer (pH 6.5, 28 mL). The reaction vessel was covered with foil to exclude light. The reaction mixture was vigorously stirred for 2 h at room temperature. The reaction mixture was filtered, cooled to 3° C., and 0.1 N NaOH was added to adjust the pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give a yellow precipitate. The product was purified by HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 L) and latter with 10% acetonitrile:water. The fractions containing the product were collected and concentrated under reduced pressure at room temperature. The yellow solid was washed with acetone, filtered and dried. Yield: 110 mg, 55%; as yellow crystals; mp 178° C. (Dec); (M+H+Na) 392.

¹H NMR (DMSO-d₆) δ 8.56 (s, 1H), 7.93 (d, 1H), 7.83 (s, 1H), 7.38 (d, 1H), 7.07 (s, 1H), 6.51 (s, 2H), 2.42 (s, 3H).

Step 4: (5R),(6Z)-6-[(7-methylimidazo[2,1][1,3]benzothiazol-2-ylmethylene)]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid: (Procedure B)

4-Nitrobenzyl-6-[(acetyloxy)(7-methylimidazo[2,1-b][1,3]benzothiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (350 mg, 0.54 mmol) was dissolved in THF (40 mL) and 6.5 pH phosphate buffer (40 ml) and hydrogenated over Pd/C (10%, 200 mg) at 40 psi pressure for 3 hrs at room temperature. At the end, reaction mixture was filtered through a pad of celite and washed with acetonitrile. The reaction mixture was concentrated to 40 ml and cooled to 0° C. and pH was adjusted to 8.5 by adding 1 N NaOH. The product was directly loaded over HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 L) and latter with 10% acetonitrile:water. The fractions were concentarated and the yellow solid was washed with acetone, filtered and dried. Yield: 110 mg, 55% as yellow solid.

Example 8 Preparation of (5R), (6Z)-6-(4,5,6,7-tetrahydro-1,3a,3b,8-tetraaza-cyclopenta[a]indene-2-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid sodium salt

Step 1: 5,6,7,8-Tetrahydro-[1,2,4]triazolo[1,5-a]pyridin-2-ylamine

The 12.7% solution of HCl in ethanol (5.35 mL) and 10% Pd—C (50% wet) (2.5 g) were added to the mixture of [1,2,4]triazolo[1,5-a]pyridin-2-ylamine (2.5 g) in ethanol (72 mL). The reaction mixture was hydrogenated at 400 KPa of H₂ for 3 days at room temperature. The mixture was filtered and concentrated under reduced pressure. The residue was treated with saturated potassium carbonate solution and extracted with chloroform. The organic layer was dried (Na₂SO₄) and concentrated under reduced pressure. The title compound was obtained as a pale yellow solid (2.31 g, 90%). ¹H-NMR (400 MHz, CDCl₃) δ 1.88-1.94 (m, 2H), 1.98-2.05 (m, 2H), 2.77 (t, 2H, J=6.2 Hz), 3.95 (t, 2H, J=6.2 Hz), 4.09 (brs, 2H).

Step 2: 4,5,6,7-Tetrahydro-1,3a,3b,8-tetraaza-cyclopenta[a]indene-2-carboxylic acid ethyl ester

Ethyl bromopyruvate (10.23 g) was added to the mixture of 5,6,7,8-tetrahydro-[1,2,4]triazolo[1,5-a]pyridin-2-ylamine (5.8 g) in 1,2-dimethoxyethane (320 mL). The reaction mixture was stirred for 5 hours at room temperature and concentrated to 100 mL under reduced pressure. The precipitate was obtained by an addition of diethyl ether (200 mL), followed by filtration. The precipitate was dissolved in ethanol (175 mL) and stirred for 20 hours at 110° C. in shield tube. The reaction mixture was cooled to room temperature and concentrated under reduced pressure. The residue was treated with saturated potassium carbonate solution and extracted with chloroform. The organic layer was dried (Na₂SO₄) and concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then eluted with ethyl acetate—methanol (1/1). The title compound was obtained as a pale yellow solid (7.56 g, 77%). ¹H-NMR (400 MHz, CDCl₃) δ 1.42 (t, 3H, J=7.1 Hz), 2.14-2.25 (m, 4H), 3.11 (t, 2H, J=6.1 Hz), 4.37 (t, 2H, J=5.7 Hz), 4.41 (q, 2H, J=7.1 Hz), 7.57 (s, 1H).

Step 3: 4,5,6,7-Tetrahydro-1,3a,3b,8-tetraaza-cyclopenta[a]indene-2-carbaldehyde

1.01 M Diisobutylalminium hydride in toluene (1.06 mL) was added dropwise to the solution of 4,5,6,7-tetrahydro-1,3a,3b,8-tetraaza-cyclopenta[a]indene-2-carboxylic acid ethyl ester (100 mg) in dry THF (5 mL) at −78° C. under a nitrogen atmosphere. The reaction mixture was stirred for 30 minutes at −78° C. and treated with ethanol (ca. 1 mL). The mixture was warmed to 0° C. and stirred for 1 h at 0° C. The reaction solution was diluted with ethyl acetate (20 mL), treated with 0.5 mL saturated ammonium chloride solution, and sonicated for ca. 5 minutes (until a precipitate was deposited enough). The mixture was dried (Na₂SO₄) and filtered through a pad of Celite. The filtrate was concentrated under reduced pressure. The residue was crystallized from dichloromethane and diethyl ether to give the title compound (47.4 mg, 58%). ¹H-NMR (400 MHz, CDCl₃) δ 2.16-2.27 (m, 4H), 3.14 (t, 2H, J=6.1 Hz), 4.39 (t, 2H, J=5.7 Hz), 7.53 (s, 1H), 10.01 (s, 1H).

Step 4: (5R, 6RS)-64(RS)-Acetoxy-[4,5,6,7-tetrahydro-1,3a,3b,8-tetraaza-cyclopenta[a]indene-2-yl]-methyl]-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester

4,5,6,7-Tetrahydro-1,3a,3b,8-tetraaza-cyclopenta[a]indene-2-carbaldehyde (2.97 g) was added to the dry acetonitrile (110 mL) solution of anhydrous MgBr₂ (4.45 g) under a nitrogen atmosphere at room temperature. The dry THF solution (110 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (2.97 g) was added to the reaction mixture, cooled to −20° C., and triethylamine (6.45 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. After the mixture was stirred for 1.2 h at −20° C., acetic anhydride (2.9 mL) was added in one portion. The reaction mixture was warmed to 0° C. and stirred for 16.5 h at 0° C. The mixture was diluted with ethyl acetate and washed with H₂O and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, eluted with ethyl acetate—n-hexane (3/1) and then with ethyl acetate—methanol (5/1). The title compound was obtained as a brown amorphous solid (651.6 mg, 13%). ¹H-NMR (400 MHz, CDCl₃) δ 2.10-2.24 (m, 4H), 2.29 (s, 3H), 3.04-3.07 (m, 2H), 4.28-4.32 (m, 2H), 5.27 (d, 1H, J=13.7 Hz), 5.43 (d, 1H, J=13.7 Hz), 6.19 (s, 1H), 6.91 (s, 1H), 7.01 (s, 1H), 7.49 (s,1H), 7.59-7.62 (m, 2H), 8.23-8.25 (m, 2H).

Step 5: (5R), (6Z)-6-(4,5,6,7-tetrahydro-1,3a,3b,8-tetraaza-cyclopenta[a]indene-2-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxyilc acid sodium salt

(5R, 6RS)-6-{(RS)-Acetoxy-[4,5,6,7-tetrahydro-1,3a,3b,8-tetraaza-cyclopenta[a] indene-2-yl]-methyl}-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (643.6 mg) was dissolved in THF (9 mL) and acetonitrile (4.2 mL). Freshly activated Zn dust (2.57 g) and 0.5 M phosphate buffer (pH 6.4, 13.2 mL) were added to the reaction mixture. The reaction vessel was covered with foil to exclude light. The mixture was vigorously stirred for 2 h at room temperature. The mixture was cooled to 3° C., and 1 N NaOH aqueous solution was added to adjust pH to 7.5. The reaction solution was mixed with ethyl acetate and filtered through a pad of Celite. The pad was washed with water. The aqueous layer was concentrated to 20 mL under high vacuum at 35° C. The concentrate was applied to Diaion HP-21 (60 mL, Mitsubishi Kasei Co. Ltd.) resin column chromatography. After adsorbing, the column was eluted with water and then with 2.5-10% acetonitrile-water. The combined fractions was concentrated under high vacuum at 35° C. and lyophilized to give the title compound as a yellow amorphous solid (68 mg, 18%, pH 7.4). Mp 175° C. (dec); ¹H-NMR (400 MHz, D₂O) δ 1.85-2.03 (m, 4H), 2.85-2.99 (m, 2H), 4.07-4.14 (m, 2H), 6.34 (s, 1H), 6.74 (s, 1H), 6.76 (s, 1H), 7.28 (s, 1H).

Example 9 Preparation of (5R,6E)-6-[(10-benzyl-1]-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-8-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic Acid

Step 1: Preparation of 8-(hydroxymethyl)dibenzo[b,f][1,4]oxazepin-11(10H)-one.

Lithium aluminum hydride (11 mL, 11 mmole) was slowly added to the solution of 11-Oxo-10,11-dihydro-dibenzo[b,f][1,4]oxazepine-8-carboxylic acid methyl ester (1.346 g, 5 mmole) in THF under N₂ at room temperature. The reaction mixture was stirred for 1 hour and 45 minutes then quenched with 2N of HCl until the pH value reaches 2-3. Removed all the THF by rotary evaporation, and extracted the reaction mixture with ethyl acetate for five times, dried the organic layer with sodium sulfate and filtered and concentrated. Obtained the desired compound (white solid) in 46% yield.

Step 2: Preparation of 11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepine-8-carbaldehyde.

8-(hydroxymethyl)dibenzo[b,f][1,4]oxazepin-11(10H)-one (0.241 g, 1 mmole) in acetonitrile was added to the molecular sieves (1 g) under N₂ at room temperature then 4-methylmorpholine N-oxide (0.175 g, 1.5 mmole) was also added into the reaction mixture. After stirring the mixture for 10 minutes, tetrapropylammonium perruthenate (0.0176 g, 0.05 mmole) was added and the reaction followed by t.l.c. until complete. Dilute the reaction mixture with 10 ml of ethyl acetate and flashed it through a small silica gel column. Collected all the ethyl acetate that contains desired material, extracted the organic layer with 1 N HCl and also washed it with brine. Dried the organic layer over sodium sulfate and filtered and concentrated. Obtained the desired-compound (white solid) in 83% yield.

Step 3: Preparation of 10-benzyl-11-oxo-10,11-dihydro-dibenzo[b,f]1,4]oxazepine-8-carbaldehyde;

Potassium carbonate anhydrous (0.207 g, 1.5 mmole) and benzyl bromide (0.205 g, 1.2 mmole) were added to a solution of the 11-oxo-10,11 dihydrodibenzo[b,f][1,4]oxazepine-8-carbaldehyde (0.240 g, 1 mmole) in acetonitrile under N₂ at room temperature. The reaction mixture then was refluxed for 4 hours, and cooled to room temperature. Diluted the reaction mixture with ethyl acetate and filtered through a magnesol pad and concentrated. Purified with silica gel column and 50% ethyl acetate in hexane. Obtained the desired compound (light yellow oil) in 63% yield.

Step 4: Preparation of 6-[acetoxy-(10-benzyl-11-oxo-10,11-dihydro-dibenzo[b,f][1,4]oxazepin-8-yl)-methyl-6-bromo-7oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester:

10-benzyl-11-oxo-10,11-dihydro-dibenzo[b,f][1,4]oxazepine-8-carbaldehyde (0.250 g, 0.759 mmole) in acetonitrile was added to magnesium bromide (0.419 g, 2.28 mmole) under N₂ at room temperature. The dry THF solution of (5R,6S)-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitrobenzyl ester (0.292 g, 0.758 mmole) then was added to the mixture. After 15 minutes the reaction mixture was cooled to −20° C., and triethylamine (0.317 mL, 2.27 mmole) was added. The reaction flask was covered with foil to exclude light. After 4 hours at −20° C., treated with acetic anhydride (0.358 mL, 3.795 mmole) and DMAP (0.00927 g, 0.0759 mmole). Warmed up the reaction mixture to 0° C. and placed it in freezer overnight. Reaction solution was concentrated and dissolved with ethyl acetate and washed with 5% of citric acid aqueous solution, saturated NaHCO₃, water and brine. Organic layer was dried in sodium sulfate and filtered and concentrated. Purified with silica gel column and 1:15 ethyl acetate/CH₂Cl₂. Obtained the desired compound (light yellow oil) in 41% yield.

Step 5: Preparation of 6-(10-benzyl-1-oxo-10,11-dihydro-dibenzo[b,f]1,4]oxazepin-8-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt:

A 0.5M phosphate buffer solution (pH 6.5) was added to a solution of 6-[acetoxy-(10-benzyl-11-oxo-10,11-dihydro-dibenzo[b,f][1,4]oxazepin-8-yl)-methyl]-6-bromo-7oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (0.210 g, 0.273 mmole) in THF, followed by 10% Pd—C (0.0546 g). The reaction mixture then was hydrogenated at 40 psi for three hours. Filtered through a celite pad and removed the THF by rotary evaporation, extracted the mixture with ethyl acetate and washed with water and brine. Dried the organic layer with sodium sulfate and filtered and concentrated. Dissolved the NaHCO₃ with minimal amount of distal water and added it to the reaction mixture along with a small amount of ethyl acetate until the pH value reaches 7-8, evaporated the ethyl acetate. Purified with reverse phase column (MCI Gel CHP20P) with varying amounts of acetonitrile (0%-20%) in water. Removed the acetonitrile and water by rotary evaporation, and freeze-dried the compound. Obtained the desired material (yellow solid) in 24% yield. Mp: 179° C. ¹H NMR (DMSO) δ 1.755-1.825 (s, 1H), 2.497-2.506 (d, 2H), 5.243-5.434 (m, 2H), 6.516-6.770 (m, 1H), 7.039-7.792 (m, 11H).

Example 10 Preparation of 6-(5-ethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacen-2-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid

Step 1: Preparation of 4-ethoxy-6,7-dihydro-5H-cyclopentapyrimidin-2-ylamine

(SM:Ross, L. O.; Goodman, L.; Baker, B. R. J. Am. Chem. Soc. 1959, 81, 3108)

5.1 grams of 4-chloro-6,7-dihydro-5H-cyclopentapyrimidin-2-ylamine was dissolved in 200 ml xylene and 30 ml absolute ethanol. Then 6.8 gram for sodium ethoxide was added and the mixture was refluxed for 3 hours. Then the solvent was removed in vacuo and 100 ml water was added to the residue. Filter and wash the cake with water (50 ml). The solid was further vacuumed to dry for several hours. The desired product weighed 5.3 gram (98% yield). Mp: 133.8-134.9° C.

H-NMR: (300 MHz, CDCl₃) δ. 6.23(s, NH2), 4.28(quartet, 2H, J=6.9 Hz), 2.6 (m, 2H), 1.93 (m, 2H), 1.27 (t, CH3, J=6.9 Hz); MS: 180.0 (M+H)

Step 2: Preparation of 5-Ethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacene-2-carboxylic acid ethyl ester

5.2 gram (29 mmol) 4-ethoxy-6,7-dihydro-5H-cyclopentapyrimidin-2-ylamine was dissolved in 100 ml dry THF. Bromopyruvate (5.4 ml,) was then added dropwise with in five minutes. The mixture was stirred at 23° C. for one hour. It was then filtered and washed with ether to give 8.7 gram of solid. This solid was then dissolved in 50 ml ethanol and refluxed for two hours. The reaction mixture was cooled to room temperature and partitioned between 350 ml chloroform and 200 ml saturated sodium bicarbonate. The organic layer was separated and dried over magnesium sulfate. Filter off the drying agent and concentrate to give 6.5 gram of product.

MP: 168.6˜168.7° C.

H-NMR: (300 MHz, CDCl₃) δ. 7.69(s,1H), 4.50 (qartet, 2H, J=7.2 Hz), 4.40 (qartet, 2H, J=7.2 Hz), 3.11 (t, 2H, J=9.6 Hz), 2.88 (t, 2H, J=9.6 Hz), 2.88 (m, 2H), 1.43 (t, 2H, J=7.2 Hz); MS: 276.2(M+H)

Step 3: Preparation of 5-ethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacene-2-carbaldehyde

1.925 grams 5-ethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacene-2-carboxylic acid ethyl ester was dissolved in 40 ml dichloromethane and then cooled to −78° C. DIBAL (1 M, 21 ml, 3 eq.) was then added within five minutes. The reaction media was then quenched with 2 ml ethanol and partitioned between 350 ml dichloromethane and 100 ml 1 N sodium hydroxide. The aqueous layer was washed with another 150 ml chloroform and the combined organic layer was dried over magnesium sulfate and filtered and concentrated to give the corresponding alcohol. The alcohol is then dissolved in 150 ml dichloromethane and 10 grams of manganese dioxide is then added. The mixture was stirred at 23° C. for two hours. The reaction mixture was then filtered through a pad of celite and concentrated to give 1.1 gram (68%) of the desired aldehyde.

MP: 237.2-237.3° C.

H-NMR: (300 MHz, CDCl₃) δ. 9.94(s,1H, CHO), 8.39 (s,1H), 4.46 (quartet, 2H, J=7.2 Hz), 3.2 (m, 2H, CH2), 2.85 (m, 2H, CH2), 2.24 (m, 2H, CH2), 1.38 (t, 3H, CH3, J=7.2 Hz); MS: 232.1(M+H)

Step 4: Preparation of 6-[acetoxy-(5-ethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacen-2-yl)-methyl]-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester

A 30 ml acetonitrile solution of 5-ethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacene-2-carbaldehyde (693 mg, 3 mmol) was added 1.03 gram of magnesium bromide etherate. The mixture was stirred at 23° C. for half an hour. Then a 30 ml dry THF solution of the 6-Bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (1.155 gram, 1 eq.) was injected within a minute and the reaction mixture was then cooled to −20° C. Triethylamine (0.7 ml, eq.) was then injected and the reaction mixture was stirred for five hours at −20° C. Then acetic anhydride (0.377 ml, eq.) was injected and the reaction mixture was left at zero degree for 18 hours. The reaction media was then diluted with 400 ml ethyl acetate and washed with 100 ml 5% citric acid, 100 ml saturated sodium bicarbonate, and 100 ml brine. The organic layer was then dried over magnesium sulfate, filtered and concentrated. Flash column chromatography using 20% ethyl acetate in hexane gave 1.1 gram product.

MP: 118.7˜119.1° C.

H-NMR: (300 MHz, CDCl₃) δ. 8.35(d, 2H, J=11 Hz), 7.63 (m, 2H), 7.41 (d,1H, J=6.9 Hz), 7.08 (d, 1H, J=1 Hz), 6.47(s, 1H), 5.55 (4H, CH2), 4.54 (m, 2H), 3.09 (m, 2H), 2.93 (m, 2H), 2.32 (m, 2H), 1.41 (t, J=9.6 Hz); MS: 660.1(M+H)

Step 5: Preparation of 6-(5-ethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacen-2-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid

6-[acetoxy-(5-ethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacen-2-yl)-methyl]-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (1.03 gram, 1.565 mmol) was suspended in 20 ml THF and 20 ml pH=6.5 aqueous phosphate buffer. The mixture was then subjected to 45 psi hydrogen for two hours. Then it was filtered through a pad of celite and concentrated in vacuo to remove most of the THF. The solution was then cooled to zero degree and basified to pH=8 with 1 N sodium hydroxide. Then it was purified via reverse phase HPLC using 1 liter of water followed by 5%-25% acetonitrile and water. Water was then removed through concentrate in vacuo and 100 mg of product was collected.

MP: >250° C.

H-NMR: (300 MHz, CDCl₃) δ. 7.52 (s,1H), 6.95(s,1H), 6.54(s,1H), 4.73 (m, 2H), 3.06(m, 2H), 2.84 (m, 2H), 2.27 (m, 2H), 1.43 (t, 3H); MS: 383.2 (M+H).

Example 11 (5R,6E&Z)-7-oxo-6-(4H,10H-pyrazolo[5,1-c][1,4]benzoxazepin-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt

Step 1: Preparation of 1-(2-fluorobenzyl)-1H-pyrazole-3,5-dicarboxylate

2-fluorobenzyl bromide (2.0 ml, 16.58 mmol) was added to a mixture of diethyl 3,5-pyrazoledicarboxylate (3.01 g, 14.18 mmol), Cs₂CO₃ (5.57 g, 17.1 mmol), and acetonitrile (140 ml) under N₂. Heated to 60° C. for two hours and then cooled to room temperature. Filtered and concentrated the reaction solution. Added water (−200 mL) to the resulting residue and extracted with EtOAc. Washed organics with water and brine. Dried organics over sodium sulfate and filtered and concentrated. Obtained diethyl 1-(2-fluorobenzyl)-1H-pyrazole-3,5-dicarboxylate (light-yellow oil) in quantitative yield.

Step 2: Preparation of 1-(2-fluorobenzyl)-1H-pyrazole-3,5-methanediol

A 1 M solution of DIBAL-H in THF (90 ml, 90 mmol) was added to a solution of diethyl 1-(2-fluorobenzyl)-1H-pyrazole-3,5-dicarboxylate (4.80 g, 14.99 mmol) in CH₂Cl₂ (90 ml) at 0° C. under N₂. After two hours quenched with NH₄Cl(aq) and suspension was formed. Filtered and extracted with EtOAc and washed with brine. Dried organics over sodium sulfate and filtered and concentrated. Purified with silica gel column and 5% MeOH in CH₂Cl₂. Obtained 3.4 g of the diol compound (clear oil) in 96% yield.

Step 3: Preparation of 4H,10H-pyrazolo[5,1-c][1,4]benzoxazepine-2-carbaldehyde

The diol compound (3.83 g, 16.21 mmol) in HMPA (24 ml) was added to a suspension of NaH (60%, 1.34 g, 33.5 mmol) in toluene (330 ml) under N₂. Rapidly heated to 95° C. for three hours and cooled to room temperature. Quenched with water and extracted with EtOAc. Washed organics with water and brine. Dried organics over sodium sulfate and filtered and concentrated. Purified with silica gel column and 2% MeOH in CH₂Cl₂. Obtained 4H,10H-pyrazolo[5,1-c][1,4]benzoxazepin-2-ylmethanol (white solid). Yield: 0.71 g 20%. 4H,10H-pyrazolo[5,1-c][1,4]benzoxazepin-2-ylmethanol (0.71 g, 3.28 mmol), 4-methylmorpholine N-oxide (1/198 g, 10.23 mmol), molecular sieves (powder, 4 angstroms) (3.32 g), and acetonitrile (0.07M) were placed together under N₂. Tetrapropylammoniumperruthenate (0.113 g, 0.322 mmol) was added and after three hours the reaction solution was filtered through celite and concentrated. Purified with silica gel column and 1:1 EtOAc/Hexane. Obtained 4H,10H-pyrazolo[5,1-c][1,4]benzoxazepine-2-carbaldehyde (white solid). Yield: 0.31 g 44%.

Step 4: Preparation of Preparation of 6-[acetoxy-(4H,10H-pyrazolo[5,1-c][1,4]benzoxazepine-8-yl)-methyl]-6-bromo-7oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester;

4H,10H-pyrazolo[5,1-c][1,4]benzoxazepine-2-carbaldehyde (0.19 g, 0.887 mmol) in acetonitrile (14 ml) was added to MgBr₂ (0.49 g, 2.66 mmol) under N₂. After 25 minutes 6-Bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (0.342 g, 0.888 mmol.) in THF (14 ml) was added. After 15 minutes the reaction was cooled to −20° C. Ten minutes later added Et₃N (3eq) and placed reaction in the dark. After 6.5 hours added Ac₂O (0.42 ml, 4.45 mmol) and DMAP (0.011 g, 0.0900 mmol). Warmed to 0° C. and placed in freezer overnight. Reaction solution was concentrated and resulting residue was taken up in EtOAc. Washed with 5% citric acid_((aq)) and saturated NaHCO_(3(aq)). Further washed with water and brine. Dried organics over sodium sulfate and filtered and concentrated. Purified with silica gel prep plates and 1:2 EtOAc/Hexane. Obtained the condensation product (yellow gum/solid). Yield: 0.31 g, 54% yield.

Step 5: (5R,6E&Z)-7-oxo-6-(4H,10H-pyrazolo[5,1-c][1,4]benzoxazepin-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt:

Step 6: A 0.5M phosphate buffer solution (pH 6.5) (18 mL) was added to a solution of the condensation product (5) (0.300 g, 0.468 mmol) in THF (18 mL). The Pd on Carbon (0.102 g) was added and the reaction mixture was hydrogenated at 40 psi for two hours. Filtered through celite and removed THF by rotary evaporation. Extracted with EtOAc. Dried organics over sodium sulfate and filtered and concentrated. NaHCO₃ (0.08 g, 0.952 mmol) was dissolved in a minimal amount of water and added to the concentrated organics along with a small amount of EtOAc. Filtered and removed EtOAc by rotary evaporation. Purified with reverse phase column (MCI Gel CHP20P) and varying amounts of acetonitrile (0% to 15%) in water. Removed the acetonitrile and most of the water from the collected fractions by rotary evaporation. Freeze-dried the rest to obtain 41 mg of (5R,6E)-7-oxo-6-(4H,10H-pyrazolo[5,1-c][1,4]benzoxazepin-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt (6) (yellow solid) in 22% yield. HPLC found the purity to be 77% and the E/Z isomer ratio to be 3:2. ¹H-NMR (6, DMSO-d₆) 5.366 (m, 4H), 5.649 (m, 4H), 6.326 (t, 2H), 6.444 (s, 2H), 6.551 (s, 2H), 6.640 (s, 2H), 6.810 (s, 2H), 6.974 (m, 2H), 7.249 (m, 2H), 7.355 (m, 2H). m/z (M+H) 390.0

Example 12 (5R), (6Z)-6-(5H-Imidazo[2,1-a]isoindol-2-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid sodium salt

Step 1: Preparation of 5H-Imidazo[2,1-a]isoindole-2-carbaldehyde

The solution of 2-bromo-3-isopropoxy-propenal (4.97 g) in dry acetonitrile (3 mL) was added to the mixture of 3-amino-1H-isoindole (3.4 g) in dry acetonitrile (100 mL). The reaction mixture was stirred for 3.25 h at room temperature. Then triethylamine (3.6 mL) was added to the mixture and heated to reflux for 2 h. The mixture was cooled to room temperature, diluted with ethyl acetate, and washed with 20% potassium hydrogen carbonate. After filtration through a pad of Celite, the organic layer was dried (MgSO₄) and concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then eluted with ethyl acetate—hexane (3/1˜4/1). The crude compound was crystallized from ethyl acetate and n-hexane to give the title compound (1.04 g, 22%). ¹H NMR (400 MHz, CDCl₃) δ 5.01 (s, 2H), 7.28-7.52 (m, 3H), 7.90 (s,1H), 7.91-7.93 (m, 1H), 9.92 (s, 1H).

Step 2: Preparation of (5R, 6RS)-6-[(RS)-Acetoxy-(5H-imidazo[2,1-a]isoindol-2-yl)-methyl]-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester:

5H-Imidazo[2,1-a]isoindole-2-carbaldehyde (736.8 mg) was added to the dry acetonitrile (50 mL) solution of anhydrous MgBr₂ (1.8 g) under a nitrogen atmosphere at room temperature. The dry THF solution (50 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (1.55 g) was added to the reaction mixture, cooled to −20° C., and triethylamine (1.34 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (0.76 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 18 h at 0° C. The mixture was diluted with ethyl acetate and washed with H₂O, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then eluted with ethyl acetate-hexane (2/3˜1/1). The title compound was obtained as two diastereo mixture (5/1, a pale yellow amorphous solid, 1.8 g, 73%). ¹H NMR (400 MHz, CDCl₃) δ 2.02 (s, 0.84×3H), 2.27 (s, 0.16×3H), 4.89-4.94 (m, 2H), 5.29 (d, 1H, J=13.6 Hz), 5.47 (d, 1H, J=13.6 Hz), 6.18 (s, 0.16×1H), 6.40 (s, 0.84×1H), 6.42 (s, 0.84×1H), 6.94 (d, 0.16×1H, J=0.9 Hz), 7.18 (d, 0.16×1H, J=0.7 Hz), 7.35-7.48 (m, 3H), 7.51 (s, 0.84×1H), 7.60-7.64 (m, 2H), 7.79-7.83 (m, 1H), 8.23-8.27 (m, 2H).

Step 3: (5R), (6Z)-6-(5H-Imidazo[2,1-a]isoindol-2-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid sodium salt

(5R, 6RS)-6-[(RS)-Acetoxy-(5H-imidazo[2,1-a]isoindol-2-yl)-methyl]-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (1.5 g) was dissolved in THF (21 mL) and acetonitrile (9.8 mL). Freshly activated Zn dust (6 g) and 0.5 M phosphate buffer (pH 6.4, 30.8 mL) were added to the reaction mixture. The reaction vessel was covered with foil to exclude light. The mixture was vigorously stirred for 2 h at room temperature. The mixture was cooled to 9° C., and 1 M NaOH aqueous solution was added to adjust pH to 7.5. The reaction solution was mixed with ethyl acetate and filtered through a pad of Celite. The pad was washed with water and the aqueous layer was separated. The aqueous layer was concentrated to 25 mL under high vacuum at 35° C. The concentrate was applied to Diaion HP-21 (100 mL, Mitsubishi Kasei Co. Ltd.) resin column chromatography. After adsorbing, the column was eluted with water and then with 5-15% acetonitrile-water. The combined fractions was concentrated under high vacuum at 35° C. and lyophilized to give the title compound as a yellow amorphous solid (527 mg, 58%). Mp 170° C. (dec); ¹H NMR (400 MHz, D₂O) 64.62 (s, 2H), 6.27 (s, 1H), 6.56 (s, 1H), 6.78 (s, 1H), 7.22-7.31 (m, 4H), 7.52 (d, 1H, J=6.7 Hz).

Example 13 Preparation of (5R,6Z)-6-[(5-methylimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid.

Step 1: Ethyl 5-methylimidazo[2,1-b]-benzthiazole-2-carboxylate:

Ethyl 5-methylimidazo[2,1-b]-benzthiazole-2-carboxylate was prepared according to the procedure as outlined in Example 1, (Step 1). Starting from 4-methly-2-amino benzothiazole (8.0 g, 48.7 m.mol) and ethyl bromopyruvate (14.0 g, 71.7 mmol), 6.0 g (45% Yield) of ethyl 5-methylimidazo[2,1-b]-benzthiazole-2-carboxylate was isolated as a brown solid. (M+H) 261.

Step 2: 5-methyl imidazo[2,1-b]-benzthiazole-2-methanol:

5-methyl imidazo[2,1-b]-benzthiazole-2-methanol was prepared according to the procedure outlined in Example 1, (Step 2). Starting from ethyl 5-methylimidazo[2,1-b]-benzthiazole-2-carboxylate (5.2 g, 20 mmol) and LiAlH₄ solution (22 ml, 0.5 M solution in THF), 3 g (69% yield) of the alcohol derivative was isolated as a brown solid. (M+H) 219.

Step 3: 2-Formyl-5-methylimidazo[2,1-b]-benzthiazole:

2-Formyl-5-methylimidazo[2,1-b]-benzthiazole was prepared according to the procedure outlined in Example 1, (Step 3). Starting from 5-methyl imidazo[2,1-b]-benzthiazole-2-methanol (2.0 g 9.1 mmol) in methylene chloride/DMF (300 mL: 50 mL) and active MnO₂ (12 g, excess), 700 mg (35% Yield) of the aldehyde derivative was isolated as brown solid. (M+H) 217.

Step 4: 4-Nitrobenzyl-6-[(acetyloxy) (5-methylimidazo[2,1-b][1,3]benzothiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate:

2-Formyl-5-methylimidazo[2,1-b]-benzthiazole (432 mg, 2.0 mmol) and the dry THF solution (40 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (770 mg, 2 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂:etherate (1.3 g, 5 mmol) under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to a silica gel column, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereo isomers were taken to next step. Pale yellow amorphous solid; Yield: 270 mg, 20%; M+H 644.

Step 5: (5R),(6Z)-6-[(5-methylimidazo[1,2-b][1,3]benzothiazol-2-ylmethylene)]-7-oxo-4-thia-1-azabicyclo [3.2.0]hept-2-ene-2-carboxylic acid:

4-Nitrobenzyl-6-[(acetyloxy) (5-methylimidazo[2,1-b][1,3]benzothiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (400 mg, 0.62 mmol) was dissolved in THF (17 mL) and acetonitrile (36 mL). Freshly activated Zn dust (5.2 g) was added rapidly with 0.5 M phosphate buffer (pH 6.5, 28 mL). The reaction vessel was covered with foil to exclude light. The reaction mixture was vigorously stirred for 2 h at room temperature. The reaction mixture was filtered, cooled to 3° C., and 1 N NaOH was added to adjust pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give yellow precipitate. The precipitate was filtered and washed with H₂O, MeCN, acetone to give the title compound. Yield: 60 mg, 24%; as yellow crystals; mp 192; M+Na 392.

¹H NMR (DMSO-d₆) δ 2.1 (s, 3H), 6.53(s, 2H), 7.1(s, 1H), 7.34-7.36 (m, 2H), 7.85(m, 1H), 8,58 (s, 1H).

Example 14 Preparation of (5R,6Z)-6-[(7-fluoroimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid.

Step 1: Ethyl 7-fluoroimidazo[2,1-b]-benzthiazole-2-carboxylate:

Ethyl 7-fluoro-imidazo[2,1-b]-benzthiazole-2-carboxylate was prepared according to the procedure as outlined in Example 1, (Step 1). Starting from 6-fluoro-2-amino benzothiazole (10.0 g, 59.5 m.mol) and ethyl bromopyruvate (17.4 g, 89.2 mmol), 3.0 g (19% Yield) of ethyl 7-fluoro-imidazo[2,1-b]-benzthiazole-2-carboxylate was isolated as a brown semi-solid. (M+H) 265.

Step 2: 7-fluoro-imidazo[2,1-b]-benzthiazole-2-methanol:

7-Fluoro-imidazo[2,1-b]-benzthiazole-2-methanol was prepared starting from Ethyl 7-fluoro-imidazo[2,1-b]-benzthiazole-2-carboxylate (2.64 g, 0.01 mol) and LiBH₄ (50 mg) in THF at refluxing temperature for 2 hrs. at the end, reaction mixture was quenched with ice cold water and acidified with 10 N. HCl. Reaction mixture was stirred for 1 hr and nuetralized with K₂CO₃. The separated residue was extracted with chloroform:methanol (3:1) and dried over anhydrous MgSO₄. It was filtered and concentrated. The crude reaction mixture was found to be pure and taken to next step with out any purification. Yeild: 1.5 g (68%) Semi solid; M+H 223.

Step 3: 2-Formyl-7-fluoro-imidazo[2,1-b]-benzthiazole:

2-Formyl-7-fluoro-imidazo[2,1-b]-benzthiazole was prepared according to the procedure outlined in Example 1, (Step 3). Starting from 7-fluoro-imidazo[2,1-b]-benzthiazole-2-methanol (1.5 g 6.7 mmol) in methylene chloride/DMF (300 mL: 50 mL) and active MnO₂ (12 g, excess), 1.1 g (78% Yield) of the aldehyde derivative was isolated as brown solid. (M+H) 221.

Step 4: 4-Nitrobenzyl-6-[(acetyloxy) (7-fluoro-midazo[2,1-b][1,3]benzothiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate:

2-Formyl-7-fluoro-imidazo[2,1-b]-benzthiazole (500 mg, 2.3 mmol) and the dry THF solution (40 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (875 mg, 2.3 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂:etherate (1.3 g, 5 mmol) under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to a silica gel column, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereo isomers were taken to next step. Pale yellow amorphous solid; Yield: 330 mg, 22%; M+H 649.

Step 5: (5R),(6Z)-6-[(7-fluoro-imidazo[1,2-b][1,3]benzothiazol-2-ylmethylene)]-7-oxo-4-thia-1-azabicyclo [3.2.0]hept-2-ene-2-carboxylic acid:

4-Nitrobenzyl-6-[(acetyloxy) (7-fluoro-imidazo[2,1-b][1,3]benzothiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (710 mg, 1.07 mmol) was dissolved in THF (17 mL) and acetonitrile (36 mL). Freshly activated Zn dust (5.2 g) was added rapidly with 0.5 M phosphate buffer (pH 6.5, 28 mL). The reaction vessel was covered with foil to exclude light. The reaction mixture was vigorously stirred for 2 h at room temperature. The reaction mixture was filtered, cooled to 3° C., and 1 N NaOH was added to adjust pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give yellow precipitate. The precipitate was filtered and washed with H₂O, MeCN, acetone to give the title compound. Yield: 80 mg, 19%; as yellow crystals; mp 200 (dec); M+Na 396.

¹H NMR (DMSO-d₆) δ 6.53(s, 1H), 6.63(s, 1H), 7.1(s, 1H), 7.45 (t, 1H), 8.04 (m, 1H), 8,13-8.10 (m, 1H), 8.61 (s,1H).

Example 15 Preparation of (5R),(6Z)-6-(5,8-dihydro-6H-imidazo[2,1-b]pyrano[4,3-d][1,3]thiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

Step 1: Preparation of ethyl 5,8-dihydro-6H-imidazo[2,1-b]pyrano[4,3-d][1,3]thiazole-2-carboxylate

A mixture of tetrahydro-4H-pyran-4-one (5.0 g, 50 mmol) in CCl₄ (100 ml) at 0° C., SO₂Cl₂ (7.4 g, 55 mmol) was slowly added. After the addition, reaction mixture was stirred at room temperature for 4 hrs and carefully quenched with ice cold water. Recation mixture was washed well and dried over anhydrous MgSO₄. The organic layer was filtered and concentrated. The colurless oil obtained was diisoolved in THF/EtOH containing thiourea (4.0 g, 52 mmol) and refluxed for 8 hrs. At the end, reaction mixture was cooled to room temperature and the separated, 6,7-dihydro-4H-pyrano[4,3-d][1,3]thiazol-2-amine hydrochloride white solid was filtered. Yield. 4.5 g (47%); M.Pt. 115° C., (M+H) 157.

To a stirred mixture of, 6,7-dihydro-4H-pyrano[4,3-d][1,3]thiazol-2-amine hydrochloride (4.0 g, 20.8 mmol) was dissolved in anhydrous ethanol (100 ml) and sodium methoxide (1.1 g, 21 mmol). This was stirred at room temperature for 30 minutes and to this ethyl bromopyruvate (10.0 g) was added and stirred at room temperature for 2 hrs. Then it was refluxed for 48 hrs. At the end reaction mixture was cooled to room temperature and concentrated. The residue was extracted with chloroform and washed well with water. The product was purified by silica-gel column chromatography by eluting it with 50% ethyl acetae: hexane. Red semi-solid; Yield: 3.1 g, (59%) M+H 253.

The ester was reduced with LiBH₄ and the resultant alcohol was oxidized with active MnO₂. The aldehyde obtained was taken to next step.

Step 3: Preparation of 4-nitrobenzyl (5R)-6-[(acetyloxy)(5,8-dihydro-6H-imidazo[2,1-b][1,3]pyrano[4,3-d][1,3]thiazol-2-yl)-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate:

2-Formyl-5,8-dihydro-6H-imidazo[2,1-b]pyrano[4,3-d][1,3]thiazole (208 mg, 1.0 mmol) and the dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (400 mg, 1.1 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂: O(Et)₂ (1.2 g, 3.0 mmol)under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereomers were taken to the next step. Pale yellow amorphous solid; Yield: 400 mg, 62%; M.Pt. 78° C.; M+H 636.

Step 4: Preparation of (5R),(6Z)-6-(5,8-dihydro-6H-imidazo[2,1-b]pyrano[4,3-d][1,3]thiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

4-nitrobenzyl (5R)-6-[(acetyloxy)(5,8-dihydro-6H-imidazo[2,1-b][1,3]pyrano[4,3-d][1,3]thiazol-2-yl)-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (500 mg, 0.79 mmol) was dissolved in THF (20 mL) and acetonitrile (10 mL). Freshly activated Zn dust (5.2 g) was added rapidly with 0.5 M phosphate buffer (pH 6.5, 28 mL). The reaction vessel was covered with foil to exclude light. The reaction mixture was vigorously stirred for 2 h at room temperature. The reaction mixture was filtered, cooled to 3° C., and 0.1 N NaOH was added to adjust the pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give a yellow precipitate. The product was purified by HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 L) and latter with 10% acetonitrile:water. The fractions containing the product were collected and concentrated under reduced pressure at room temperature. The yellow solid was washed with acetone, filtered and dried. Yield: 85 mg, 30%; as yellow crystals; mp 205° C.; (M+H+Na) 383. ¹H NMR (DMSO-d₆) δ 2.8 (m, 2H), 4.0 (m,2H), 4.6(s,2H), 6.4 (s,1H), 6.5 (s,1H), 7.0 (s,1H), 8.1 (s,1H).

Example 16 Preparation of (5R),(6Z)-6-(imidazo[2,1-b]bebzothiazol-7-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

Step 1: Preparation of imidazo[2,1-b][1,3]benzothiazol-7-ylmethanol: A solution of ethyl imidazo[2,1-b][1,3]benzothizole-7-carboxylate (1.1 g, 4.5 mmol) in THF (50 ml) was slowly added to to a stirred solution of LiBH₄ (1 g) in THF (100 ml) at 0° C. The reaction mixture was refluxed for 2 hrs and cooled to room temperature. It was quenched with ice cold water andf carefully nuetralized with Con. HCl. The soltion was stirred at room temperature for 2 hrs and basified with K₂CO₃ (solid). At the end, reaction mixture was extracted with chloform: methanol (3:1) and dried over anhydrous MgSO₄. It was filtered and concentrated. The product was pue enough and taken to next step with out purification. Brown solid. M.t. 75° C.; (M+H) 205. Yield; 800 mg, (87%).

Step 2: Preparation of 7-fomyl-imidazo[2,1-b][1,3]benzothiazol:

Imidazo[2,1-b][1,3]benzothiazol-7-ylmethanol (700 mg, 3.4 mmol) obtained by the above mentioned process was oxidiazed with active MnO₂ (2 g) in CH₂Cl₂=under refluxing condition. The reaction mixture was stirred for 6 hrs and cooled to room temperature. It was filtered and through celite and concentrated. The separated brown color solid was triturated with diethyl ether and filtered. It was found to be pure enough and taken to next step with out purification. Yield. 400 mg (58%); (M+H) 203.

Step 3: 4-Nitrobenzyl-6-[(acetyloxy) (imidazo[2,1-b][1,3]benzothiazol-7-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate:

7-fomyl-imidazo[2,1-b][1,3]benzothiazol (260 mg, 1.3 mmol) and the dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (500 mg, 1.14 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂: O(Et)₂ (390 mg, 1.5 mmol)under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereomers were taken to the next step. Pale yellow amorphous solid; Yield: 750 mg, 91%; M.pt. 82° C.; M+H 630.

Step 5: 5R),(6Z)-6-(imidazo[2,1-b]bebzothiazol-7-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid:

4-Nitrobenzyl-6-[(acetyloxy) (imidazo[2,1-b][1,3]benzothiazol-7-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (900 mg, 1.4 mmol) was dissolved in THF (20 mL) and acetonitrile (20 mL) and 0.5 M phosphate buffer (pH 6.5, 20 mL) and hydrogenated over Pd/C (10%) at 40 psi pressure for 6 hrs. The reaction vessel was covered with foil to exclude light. The reaction mixture was filtered, cooled to 3° C., and 0.1 N NaOH was added to adjust the pH to 8.5. The filtrate was concentarted and the aqueous layer was washed with ethyl acetate. The aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give a yellow precipitate. The product was purified by HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 L) and latter with 10% acetonitrile:water. The fractions containing the product were collected and concentrated under reduced pressure at room temperature. The yellow solid was washed with acetone, filtered and dried. Yield: 180 mg, 36%; as yellow crystals; mp 235° C.; (M+H+Na) 378.

¹H NMR (DMSO-d₆) δ 6.3 (s, 1H), 6.6 (s,1H), 7.1 (s, 1H), 7.52 (s, 1H), 8.1-8.5 (m,3H), 8.7 (s, 1H).

Example 17 Preparation of (5R),(6Z)-7-oxo-6-([1,3]thiazolo[3,2-a]benzimidazol-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

Step 1: Preparation of benzo[4.5]imidazo[2,1-b]thazole-2-carbaldehyde: To a stirred solution of 2-mercapto benzimidazole (5.0 g, 33.3 mmol) and K₂CO₃ (4.59 g, 33.3 mmol) in anhydrous DMF (100 mL) bromomalonaldehyde (4.99 g, 33.3) was added and heated to 8 hrs at 80° C. At the end, reaction mixture was concentrated to dryness and ice cold water was added.and nuetralzed with 1 N HCl. The product was extarcted with chloroform and washed with water and dried over anhydrous MgSO₄. It was filterd and concentrated. The residue was taken in DMF/acetic acid mixture (1:1) (100 ml) and heated at 120° C. for 6 hrs. The reaction mixture was concentarted and extracted with chloroform; washed well with water and dried over anhydrous MgSO₄. It was filtered and concentarted. The separated solid was triturated with diethyl ether and filtered. Yield: 4.2 g (62%); (M+H) 203.

Step 2: 4-Nitrobenzyl (5R)-6-[(acetyloxy) ([1,3]thiazolo[3,2-a]benzimidazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate:

Benzo[4,5]imidazo[2,1-b]thazole-2-carbaldehyde (404 mg, 2 mmol) and the dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (772 mg, 2 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂: O(Et)₂ (1.65 g, excess)under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereomers were taken to the next step. Pale yellow amorphous solid; Yield: 800 mg 63%; M.pt. 78° C.; (M+H) 630.

Step 3: (5R),(6Z)-7-oxo-6-([1,3]thiazolo[3,2-a]benzimidazol-2-ylmethylene0-4-thia-1-azabicyclo [3.2.0]hept-2-ene-2-carboxylic acid:

4-Nitrobenzyl (5R)-6-[(acetyloxy) ([1,3]thiazolo[3,2-a]benzimidazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate: (630 mg, 1.0 mmol) was dissolved in THF (20 mL) and acetonitrile (20 mL) and 0.5 M phosphate buffer (pH 6.5, 20 mL) and hydrogenated over Pd/C (10%) at 40 psi pressure for 6 hrs. The reaction vessel was covered with foil to exclude light. The reaction mixture was filtered, cooled to 3° C., and 0.1 N NaOH was added to adjust the pH to 8.5. The filtrate was concentarted and the aqueous layer was washed with ethyl acetate. The aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give a yellow precipitate. The product was purified by HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 L) and latter with 10% acetonitrile:water. The fractions containing the product were collected and concentrated under reduced pressure at room temperature. The yellow solid was washed with acetone, filtered and dried. Yield: 190 mg, 50%; as yellow crystals; mp 240° C. (Dec); (M+H+Na) 378.

¹H NMR (DMSO-d₆) δ 6.3 (s, 1H), 6.4 (s,1H), 6.6 (d, 2H), 7.29-7.39 (m, 2H), 7.69-7.73 (t,1H), 8.1-8.19 (m, 1H), 8.84 (s,1H).

Example 18 Preparation of (5R),(6Z)-6-(7,8-dihydro-6H-cyclopenta[3,4]pyrazolo[5,1-b][1,3]thiazol-2-ylmethylene)-7-oxo-6-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

Step 1: Preparation of 7,9-dihydro-6H-cyclopenta[3,4]pyrazolo[5,1-b][1,3]thiazole-2-carbaldehyde:

To a stirred solution of 1,4,5,6-tetrahydrocyclopenta[c]pyrazole-3(H)-thione [Prepared by the procedure of T. takeshima, N. Oskada, E. Okabe and F. mineshima, J. Chem. Soc. Perkin. Trans. I, 1277-1279, (1975)] (5.3 g, 37.85 mmol) and K₂CO₃ (10.4 g, 75 mmol) in anhydrous DMF (100 mL) bromomalonaldehyde (5.7 g, 37.85) was added and heated to 8 hrs at 80° C. At the end, reaction mixture was concentrated to dryness and ice cold water was added.and nuetralzed with 1 N HCl. The product was extarcted with chloroform and washed with water and dried over anhydrous MgSO₄. It was filterd and concentrated. The residue was taken in DMF/acetic acid mixture (1:1) (100 ml) and heated at 120° C. for 6 hrs. The reaction mixture was concentarted and extracted with chloroform; washed well with water and dried over anhydrous MgSO₄. It was filtered and concentarted. The product was purified by SiO₂ column chromatography by eluting it with 75% ethyl acetate:hexane. Yield: 2.2 g (30%); M.Pt. 112° C.; (M+H) 193.

Step 2: 4-Nitrobenzyl-(5R)-6-[(acetyloxy) (7,8-dihydro-8H-cyclopenta[3,4]pyrazolo[5,1-b][1,3]thiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate

7,9-dihydro-6H-cyclopenta[3,4]pyrazolo[5,1-b][1,3]thiazole-2-carbaldehyde (576 mg, 3 mmol) and the dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (1.16 g, 3 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂: O(Et)₂ (1.65 g, excess)under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereomers were taken to the next step. Pale yellow amorphous solid; Yield: 1.5 g, 83%; M.pt. 69° C.; (M+H) 620.

Step 3: (5R),(6Z)-6-(7,8-dihydro-6H-cyclopenta[3,4]pyrazolo[5,1-b][1,3]thiazol-2-ylmethylene)7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

4-Nitrobenzyl-(5R)-6-[(acetyloxy) (7,8-dihydro-8H-cyclopenta[3,4]pyrazolo[5,1-b][1,3]thiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (1.2 g, 1.9 mmol) was dissolved in THF (30 mL) and acetonitrile (30 mL) and 0.5 M phosphate buffer (pH 6.5, 30 mL) and hydrogenated over Pd/C (10%) at 40 psi pressure for 6 hrs. The reaction vessel was covered with foil to exclude light. The reaction mixture was filtered, cooled to 3° C., and 0.1 N NaOH was added to adjust the pH to 8.5. The filtrate was concentarted and the aqueous layer was washed with ethyl acetate. The aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give a yellow precipitate. The product was purified by HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 L) and latter with 10% acetonitrile:water. The fractions containing the product were collected and concentrated under reduced pressure at room temperature. The yellow solid was washed with acetone, filtered and dried. Yield: 420 mg, 38%; as yellow crystals; mp 190° C. (Dec); (M+H+Na) 368.

¹H NMR (DMSO-d₆) ¹H NMR (DMSO-d₆) δ 2.38-2.42 (m, 2H), 2.69-2.89 (m, 4H), 6.57 (s, 1H), 6.58 (s,1H), 7.36 (s, 1H), 8.53 (s,1H).

Example 19 Preparation of (5R),(6Z)-7-oxo-6-(5,6,7,8-tetrahydroimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

Step 1: Preparation of ethyl 5,6,7,8-tetrahydroimidazo[2,1-b][1,3]benzothiazole-2-carboxylate.

A mixture of 2-chlorocyclohexanone (13.2 g, 100 mmol) and thiourea (8.0 g 101 mmol) was refluxed in ethanol: THF (1:2) for 16 hrs. The reaction mixture was cooled to room temperature and the separated white solid was filtered. (12.0 g separated) This was dissolved in anhydrous ethanol (100 ml) and sodium methoxide (3.3 g, 63 mmol). To this ethyl bromopyruvate (15.0 g) was added and stirred at room temperature for 2 hrs. Then it was refluxed for 48 hrs. At the end reaction mixture was cooled to room temperature and concentrated. The residue was extracted with chloroform and washed well with water. The product was purified by silica-gel column chromatography by eluting it with 50% ethyl acetae: hexane. Red semi-solid; Yield: 6.2 g (39%); M+H 251.

The ester was reduced with LiBH₄ and the resultant alcohol was oxidized with active MnO₂. The aldehyde obtained was taken to next step.

Step 3: Preparation of 4-nitrobenzyl (5R)-6-[(acetyloxy)(5,6,7,8-tetrahydroimidazo[2,1-b][1,3]benzothiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate:

5,6,7,8-tetrahydroimidazo[2,1-b][1,3]benzothiazole-2-carbaldehyde (412 mg, 2.0 mmol) and the dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (770 mg, 2 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂: O(Et)₂ (1.2 g, 3.0 mmol)under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereomers were taken to the next step. Pale yellow amorphous solid; Yield: 980 mg, 77%; M+H 634.

Step 4: Preparation of (5R),(6Z)-7-oxo-6-(5,6,7,8-tetrahydroimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

4-nitrobenzyl (5R)-6-[(acetyloxy)(5,6,7,8-tetrahydroimidazo[2,1-b][1,3]benzothiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (980 mg, 1.55 mmol) was dissolved in THF (20 mL) and acetonitrile (10 mL). Freshly activated Zn dust (5.2 g) was added rapidly with 0.5 M phosphate buffer (pH 6.5, 28 mL). The reaction vessel was covered with foil to exclude light. The reaction mixture was vigorously stirred for 2 h at room temperature. The reaction mixture was filtered, cooled to 3° C., and 0.1 N NaOH was added to adjust the pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give a yellow precipitate. The product was purified by HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 L) and latter with 10% acetonitrile:water. The fractions containing the product were collected and concentrated under reduced pressure at room temperature. The yellow solid was washed with acetone, filtered and dried. Yield: 120 mg, 20%; as yellow crystals; mp 250° C. (Dec); (M+H+Na) 382. ¹H NMR (DMSO-d₆) δ 1.9 (m,2H), 2.5 (m, 2H), 3.2-3.4 (m, 4H), 6.6 (s, 1H), 7.1 (s, 1H), 7.5 (s, 1H), 8.1 (s, 1H).

Example 20 Preparation of (5R),(6Z)-8-[(9-methyl-9H-imidazo[1,2-a]benzimidazol-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

Step 1: Preparation of 9-methyl-9H-imidazo[2-a]benzimidazole-2-carbaldehyde.

To stirred solution of LiBH₄ (1.79 g, 82 mmol) in THF at 0° C., ethyl 9-methyl-9H-imidazo[1,2-a]benzimidazole-2-carboxylate (2.5 g, 10.3 mmol) was added drop wise. The reaction mixture was refluxed for 2 hrs and cooled to room temperature. Ti was carefully quenched with icve cold water and acidified with Con. HCl to pH 4. The reaction mixture was stirred at room temperature for 1 hr and basified with K₂CO₃. The residue was extracted with chloroform; methanol (3:1) and dried over anhydrous MgSO₄. It was filtered and concentrated. Yield. 1.3 g (65%). (M+H) 202. The resdue (1.3 g, 6.4 mmol) was oxidised with MnO₂ (5.0 g) in CH₂Cl₂ under refluxing condition. After the completion, reaction mixture was filtered and concentrated. It was purified by SiO₂ column chromatography by eluting it with 1:1 ethyl acetate:hexane. Brown solid. Yield. 330 mg (25%); (M+H) 200.

Step 2: Preparation of 4-nitrobenzyl (5R)-6-[(acetyloxy)(9-methyl-9H-imidazo[1,2-a]benzimidazole-2-)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate:

9-methyl-9H-imidazo[1,2-a]benzimidazole-2-carbaldehyde. (330 mg, 1.65 mmol) and the dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (770 mg, 2 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂: O(Et)₂ (1.2 g, 3.0 mmol)under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereomers were taken to the next step. Pale yellow amorphous solid; Yield: 330 mg, 31%; (M+H) 628.

Step 3: Preparation of (5R),(6Z)-8-[(9-methyl-9H-imidazo[1,2-a]benzimidazol-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

4-nitrobenzyl (5R)-6-[(acetyloxy)(9-methyl-9H-imidazo[1,2-a]benzimidazole-2-)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate: (1 g, 1.6 mmol) was dissolved in THF (20 mL) and acetonitrile (10 mL). Freshly activated Zn dust (5.2 g) was added rapidly with 0.5 M phosphate buffer (pH 6.5, 28 mL). The reaction vessel was covered with foil to exclude light. The reaction mixture was vigorously stirred for 2 h at room temperature. The reaction mixture was filtered, cooled to 3° C., and 0.1 N NaOH was added to adjust the pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give a yellow precipitate. The product was purified by HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 L) and latter with 10% acetonitrile:water. The fractions containing the product were collected and concentrated under reduced pressure at room temperature. The yellow solid was washed with acetone, filtered and dried. Yield: 140 mg, 23%; as yellow crystals; mp 220° C. (Dec); (M+H+Na) 375. ¹H NMR (DMSO-d₆) δ 3.4 (s,3H), 6.54 (s, 1H), 6.56 (s, 1H), 7.01 (s, 1H), 7.21 (t, 1H), 7.3 (t, 1H), 7.56 (d, 1H), 7.85 (d,1H), 8.1 (s,1H).

Example 21 Preparation of (5R,6Z)-7-oxo-6-(4H-thieno[2′,3′:4,5]thiopyrano[2,3-b]pyridin-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid (Sodium salt)

Step 1: 2,3 dihydro-4H-thiopyrano[2,3-b]pyridin-4-one:

A solution of 14 g. (61.6 mmol) 3-(3-Carboxy-2-pyridylthio)propionic Acid [prepared as described in lit.: J. Heterocyclic Chem., 37, 379(2000)] and 15 g. (185 mmol, 3 eqs) of anhydrous sodium acetate, in 200 mL. of acetic anhydride was refluxed (160° C.) under stirring, N₂ atm, dry conditions, for 2 hours. Cooled, diluted with 300 mL of water, basified with 30% ammonium hydroxide solution to pH 8-9, extracted with 3×200 mL chloroform. Combined organics washed with 2×60 mL Sodium bicarbonate (satn.sol), water, dried, evaporated, gave 2.8 g. (27%) of the title compound, reddish solid, m.p. 66-8° C., (M+H)⁺=166.2.

Step 2: 4-chloro-2H-thiopyrano[2,3b]pyridine-3-carbaldehyde:

A solution of 6.6 g. (43 mmol, 1 eq) of phosphorous oxychloride in 30 mL methylene chloride was dropwise added to 3.95 g (43 mmol, 1.25 eqs) of anhydrous dimetylformamide (0° C., stirring, N₂ atm, dry conditions) with such a rate to maintain temperature between 0-5° C.; RM was stirred at RT for 2 hours, cooled to 0° C., and a solution of 8.9 g. (54 mmol, 1.25 eqs.) of 2,3 dihydro-4H-thiopyrano[2,3-b]pyridin-4-one in 30 mL of methylene chloride was dropwise added over a 20 min. period. RM stirred at RT for 2 hours, poured over crushed ice:sodium acetate 4:1 mixture, extracted with 4×150 mL methylene chloride, combined organics washed with water, dried, evaporated, gave 7.76 g (68%) of the title compound, brownish solid, m.p. 56-8° C., (M+H)⁺=212.6.

Step 3: Ethyl 4H-thieno[2′3′:4,5]thiopyrano[2,3b]pyridine-2 carboxylate:

To a solution of 7.5 g. (35 mmol, 1 eq.) of 4-chloro-2H-thiopyrano[2,3b]pyridine-3-carbaldehyde in 250 mL of methylene chloride were added (under stirring, N₂ atm, dry conditions): 4.7 g. (39 mmol, 1.1 eqs) of ethyl mercaptoacetate, and 7.2 g. (71 mmol, 2 eqs) of triethylamine in 30 mL of methylene chloride. RM was refluxed for 2 hours, quenched with 100 mL of water, organics separated, waters extracted with 4×150 mL of methylene chloride, combined organics dried, evaporated. Residue purified on a silicagel column, using hexane:ethyl acetate 3:1 as a solvent, gave 7.6 g. (78%) of the title compound, yellow crystals, m.p. 113-5° C., (M+H)⁺=278.3.

Step 4: 4H-thieno[2′,3′:4,5]thiopyrano[2,3b]pyridin-2-ylmethanol:

To a cold solution of 7.5 g. (27 mmol) of Ethyl 4H-thieno[2′3′:4,5]thiopyrano[2,3b]pyridine-2 carboxylate in 300 mL of dry tetrahydrofuran (0° C., N₂ atm, dry condition) was dropwise added 60 mL (60 mmol, 2.1 eqs) of 1M cold solution of Lithium Aluminum Hydride in tetrahydrofuran, and RM stirred at RT untill the SM disappeared (monitored by TLC/MS). Cooled to 0° C., RM was quenced with aquous 2N formic acid solution to neutral pH=8, and stirred at RT for 2 hours, filtered, filtrate extracted 4×200 mL methylene chloride, combined organics dried, evaporated gave 6.0 g. (94%) of the desired compound, yellow crystals, m.p. 1124° C., (M+H)⁺=236.4.

Step 5: 4H-thieno[2′,3′:4,5]thiopyrano[2,3b]pyridin-2-carbaldehyde:

To a solution of 3.0 g. (12.8 mmol) of 4H-thieno[2′,3′:4,5]thiopyrano[2,3b]pyridin-2-ylmethanol in 200 mL of chloroform, was added 9.0 g. (80 mmol, 7 eqs) of activated manganese(IV)oxide, and RM refluxed under stirring, N₂ atm., for 12 hours. Filtered trough a celite pad, filtrate evaporated, and residue purified on a silicagel column, gave 2.5 g. (86%) of the title compound, yellow crystals, m.p. 93-5° C., (M+H)⁺=234.4.

Step 6: 4-nitrobenzyl(5R)-6-[(acetyloxy)(4H-thieno[2′,3′:4,5]thiopyrano[2,3b]pyridin-2-yl) methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0.]hept-ene-2carboxylate

In a sealed dry r.b. flask, flushed with N₂, were added: 4H-thieno[2′,3′:4,5]thiopyrano[2,3b]-pyridin-2-carbaldehyde 0.6 g. (2.57 mmol, 1 eq), anhydrous THF (15 mL), anhydrous ACN (15 mL), 0.520 g. (2.8 mmol, 1.1 eqs) anhydrous MgBr2, and RM stirred at RT for 30 min. To the RM was added 2.5 mL (14 mmol, 5.4 eqs) of anhydrous triethylamine, 10 mL of anhydrous THF, RM cooled at (−20° C.), and 0.95 g. (2.5 mmol, 1 eq) of bromopenam was added. RM stirred at (−20° C.) for 6 hours. At the same temperature, 3 mL (3 mmol, 1.15 eqs) of acetic anhydride was added, RM stirred for 15 min and kept at 0° C. for 12 hours, evaporated to dryness, residue extracted with 5×80 mL ethyl acetate. Organic solvent evaporated, and residue purified an a silicagel column (solvent hexane:ethyl acetate 4:1), gave 0.880 g. (52%) of the title compound, yellowish crystals, m.p. 141-3° C., (M+H)⁺=661.6.

Step 7: (5R,6Z)-7-oxo-6-(4H-thieno[2′,3′:4,5]thiopyrano[2,3-b]pyridin-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid (Sodium salt)

A solution of 4-nitrobenzyl(5R)-6-[(acetyloxy)(4H-thieno[2′,3′:4,5]thiopyrano[2,3b]pyridin-2-yl) methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0.]hept-ene-2carboxylate 0.8 g. (1.21 mmol, 1 eq) in 40 mL THF and 40 mL phosphate buffer solution (pH=6.36) was hydrogenated at 40 psi for 3 hours in the presence of 0.4 g. Palladium on Carbon 10% catalyst. RM filtrated trough celite pad, filtrate adjusted to pH=8.0, concentrated in vacuo, residue purified on a reverse-phase column (amberlite), using 5% . . . 10% ACN/water mixture as solvent, gave 0.103 g. (21%) of the title compound, reddish crystals, m.p. 362.4° C., (M+H)⁺=409.5. ¹H NMR: (DMSO-d₆) δ 4.12(s,2H), 6.49 (s,1H), 6.53(s,1H); 7.22(d,1H); 7.34 (s,1H); 7.41 9s,1H), 7.76 (t,1H); 8.28 (d,1H).

Example 22 Preparation of (5R,6Z)-6-[(5-methyl-7,8-dihydro-6H-cyclopenta[e][1,2,4]triazolo[1,5-a]pyrimidin-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt

Step 1: Preparation of (8-Methyl-6,7-dihydro-5H-cyclopenta[d][1,2,4]triazolo[1,5-a]pyrimidin-2-yl)-methanol

To a round bottomed flask was loaded 3.78 grams of 2-acetylcyclopentanone, 3.52 grams of (5-Amino-1H-[1,2,4]triazol-3-yl)-methanol and 50 ml 2-methoxyethanol. The mixture was refluxed for 18 hours. Then it was cooled down to 23° C. and concentrated to 5 ml. Then 50 ml ethyl ether was added and the precipitate was filtered and vacuum dried to yielded 2.0 grams of product. This compound was used directly for the next step. MS: 205.2(M+H). H-NMR(DMSO): δ 5.55(t, 1H, OH, J=6.2 Hz), 4.63(d, 2H, J=6.2 Hz), 3.28 (m, 2H), 3.02 (t, 2H, CH2, J=6.8 Hz), 2.51 (s, 3H, CH3), 2.27 (m, 2H, CH2).

Step 2: Preparation of 8-Methyl-6,7-dihydro-5H-cyclopenta[d][1,2,4]triazolo[1,5-a]pyrimidine-2-carbaldehyde

To a round bottomed flask was loaded 0.17 ml of DMSO and 1 ml dichloromethane. The mixture was cooled to −50˜−60° C. Then a mixture of 0.1 ml oxallyl chloride and 2 ml dichloromethane was injected in into the flask all at once. The mixture was stirred at the same temperature for another 5 minutes. Then 0.174 grams of (8-Methyl-6,7-dihydro-5H-cyclopenta[d][1,2,4] triazolo [1,5-a]pyrimidin-2-yl)-methanol in 2 ml dichloromethane was added within 2 minutes. The mixture was stirred at −50˜−60° C. for fifteen minutes and 0.7 ml triethylamine was next added. After another five minutes the reaction media was warmed up to 23° C. and a mixture of 20 ml water and 200 ml dichloromethane was added. The organic layer was dried over magnesium sulfate. Filter off the drying agent and concentrate the filtrate yielded 0.153 grams of product (89%). MS: 203.1(M+H). H-NMR(CDCl3): δ 10.24(s, 1H), 3.49(m, 2H), 3.15(m, 2H), 2.67 (s, 3H, CH3), 2.44 (m, 2H, CH2).

Step 3: Preparation of 4-nitrobenzyl (5R)-6-[(acetyloxy)(5-methyl-7,8-dihydro-6H-cyclopenta[e][1,2,4]triazolo[1,5-a]pyrimidin-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate

8-Methyl-6,7-dihydro-5H-cyclopenta[d][1,2,4]triazolo[1,5-a]pyrimidine-2-carbaldehyde (153 mg, 0.75 mmol) and the dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (385 mg, 1 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂: O(Et)₂ (1.2 g, 3.0 mmol)under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereomers were taken to the next step. Pale yellow amorphous solid; Yield: 200 mg, 42%; (M+H) 631.

Step 4: Preparation of (5R,6Z)-6-[(5-methyl-7,8-dihydro-6H-cyclopenta[e][1,2,4]triazolo[1,5-a]pyrimidin-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

4-nitrobenzyl (5R)-6-[(acetyloxy)(5-methyl-7,8-dihydro-6H-cyclopenta[e][1,2,4]triazolo[1,5-a]pyrimidin-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (200 mg, 0.31 mmol) was dissolved in THF (20 mL) and acetonitrile (20 mL) and phophate buffer (6.5 pH) (20 ml) and hydrogenated over Pd/C (10%) (200 mg) under 40 psi pressure. At the end, reaction mixture was filtered, cooled to 3° C., and 0.1 N NaOH was added to adjust the pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give a yellow precipitate. The product was purified by HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 L) and latter with 10% acetonitrile:water. The fractions containing the product were collected and concentrated under reduced pressure at room temperature. The yellow solid was washed with acetone, filtered and dried. Yield: 15 mg, 13%; as yellow crystals; mp 250° C. (Dec); (M+H+Na) 378. ¹H NMR (DMSO-d₆) δ 6.80 (s, 1H), 6.76(s, 1H), 6.25(s, 1H), 3.24(m, 2H), 2.96 (m, 2H), 2.49(s, 3H), 2.25(m, 2H).

Example 23 Preparation of (5R,6Z)-6-{[7-(ethoxycarbonyl)-6,7,8,9-tetrahydropyrido[3,4-e][1,2,4]triazolo[1,5-a]pyrimidin-2-yl]methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt

Step 1: Preparation of 2-Hydroxymethyl-8,9-dihydro-6H-1,3,4,7,9b-pentaaza-cyclopenta[a]naphthalene-7-carboxylic acid ethyl ester

To a round bottomed flask was loaded 8.56 grams of 4-oxo-piperidine-1-carboxylic acid ethyl ester, 10.3 ml of dimethylformamide dimethylacetal, and the mixture was refluxed at 90° C. for two hours. Then it was poured into 75 ml water and extracted with 2×250 ml dichloromethane. The combined organic layers was washed with 50 ml brine and dried over magnesium sulfate. Filter off the drying agent and concentrate gave 28 grams of 3-Dimethylaminomethylene-4-oxo-piperidine-1-carboxylic acid ethyl ester. This material (12.8 grams) was then loaded into a round bottomed flask along with 3.42 grams of (5-Amino-1H-[1,2,4]triazol-3-yl)-methanol and 100 ml 2-methoxyethanol. The mixture was refluxed for 18 hours. Then it was cooled down to 23° C. and concentrated to 5 ml. Then 50 ml ethyl ether was added and the precipitate was filtered and vaccum dried to yielded 1.5 grams of product. MS: 278.1 (M+H). H-NMR(CDCL3): δ 8.60(s, 1H), 4.98(s, 2H), 4.78(s, 2H, CH2), 4.22(q, 2H, J=4.8 Hz), 3.75 (t, 2H, CH2, J=4 Hz), 3.51 (t, 2H, J=4 Hz), 1.32 (m, 3H, CH3, J=4.8 Hz).

Step 2: Preparation of 2-Formyl-8,9-dihydro-6H-1,3,4,7,9b-pentaaza-yclopenta[a]naphthalene-7-carboxylic acid ethyl ester

2-Hydroxymethyl-8,9-dihydro-6H-1,3,4,7,9b-pentaaza-cyclopenta[a]naphthalene-7-carboxylic acid ethyl ester (831 mg, 3 mmol) was converted to 2-formyl-8,9-dihydro-6H-1,3,4,7,9b-pentaaza-yclopenta[a]naphthalene-7-carboxylic acid ethyl ester (690 mg, 89% Yield) by the procedure outlined in example 22, (step 2). MS: 276.1(M+H). H-NMR(CDCl3): δ 10.24(s, 1H), 8.76(s, 1H), 4.86(s, 2H), 4.23 (q, 2H, CH2, J=7.2 Hz), 4.13 (t, 2H, CH2, J=7.2 Hz) 3.39 (t, 2H, CH2, J=5.7 Hz), 1.34 (t, 3H, CH3, J=7.2 Hz).

Step 3: ethyl 2-[(acetyloxy)((5R)-6-bromo-2-([(4-nitrobenzyl)oxy]carbonyl}-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-en-6-yl)methyl]-8,9-dihydropyrido[3,4-e][1,2,4]triazolo[1,5-a]pyrimidine-7(6H)-carboxylate

2-formyl-8,9-dihydro-6H-1,3,4,7,9b-pentaaza-yclopenta[a]naphthalene-7-carboxylic acid ethyl ester (550 mg, 2 mmol) and the dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (770 mg, 2 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂: O(Et)₂ (1.2 g, 3.0 mmol)under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereomers were taken to the next step. Pale yellow amorphous solid; Yield: 220 mg, 15%; (M+H) 703.

Step 4: Preparation of (5R,6Z)-64f7-(ethoxycarbonyl)-6,7,8,9-tetrahydropyrido[3,4-e][1,2,4]triazolo[1,5-a]pyrimidin-2-yl]methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

ethyl 2-[(acetyloxy)((5R)-6-bromo-2—[(4-nitrobenzyl)oxy]carbonyl)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-en-6-yl)methyl]-8,9-dihydropyrido[3,4-e][1,2,4]triazolo[1,5-a]pyrimidine-7(6H)-carboxylate (220 mg, 0.28 mmol) was dissolved in THF (20 mL) and acetonitrile (20 mL) and phophate buffer (6.5 pH) (20 ml) and hydrogenated over Pd/C (10%) (200 mg) under 40 psi pressure. At the end, reaction mixture was filtered, cooled to 3° C., and 0.1 N NaOH was added to adjust the pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give a yellow precipitate. The product was purified by HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 L) and latter with 10% acetonitrile:water. The fractions containing the product were collected and concentrated under reduced pressure at room temperature. The yellow solid was washed with acetone, filtered and dried. Yield: 15 mg, 2%; Yellow crystals; mp>250° C. (Dec); (M+H+Na) 449. ¹H NMR (DMSO-d₆) δ 8.61 (s, 1H), 7.01 (s, 1H), 6.90(s, 1H), 6.44(s, 1H), 4.74(m, 2H, CH2), 4.13 (q, 2H, J=5.4 Hz), 3.84(s, m, 2H, CH2),1.22(t, 3H, CH3, J=5.7 Hz).

Example 24 Preparation of (5R,6Z)-6-(8′,9′-dihydro-6′H-spiro[1,3-dioxolane-2,7′-[1,2,4]triazolo[1,5-a]quinazolin]-2′-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt

Step 1: Preparation of 2-Hydroxymethyl-8,9-dihydro-6H-[1,2,4]triazolo[1,5-a]quinazolin-7-ethylene ketal

To a round bottomed flask was loaded 15.6 g of 1,4-cyclohexadione mono-ethylene ketal, 11.9 g of dimethylformamide dimethylacetal, and the mixture was refluxed at 90° C. for two hours. Then it was poured into 75 ml water and extracted with 2×250 ml dichloromethane. The combined organic layers was washed with 50 ml brine and dried over magnesium sulfate. Filter off the drying agent and concentrate gave 28 grams of 3-Dimethylaminomethylene-4-oxo-cyclohexane. The crude product was then loaded into a round bottomed flask along with 11.9 grams of (5-Amino-1H-[1,2,4]triazol-3-yl)-methanol and 100 ml 2-methoxyethanol. The mixture was refluxed for 18 hours. Then it was cooled down to 23° C. and concentrated to 5 ml. Then 50 ml ethyl ether was added and the precipitate was filtered and vaccum dried to yielded 2.0 grams (8% Yield) of product. MS: 263 (M+H). H-NMR(CDCL3): δ 8.51 (s, 1H), 5.17(s, 2H, CH2), 4.08(s, 4H, OCH2CH2O), 3.42(t, 2H, CH2, J=5.1 Hz), 3.07 (s, 2H, CH2), 2.15 (t, 3H, CH3, J=5.1 Hz).

Step 2: Preparation of 7-ethyleneketal-6,7,8,9-tetrahydro-[1,2,4]triazolo[1,5-a]quinazoline-2-carbaldehyde

To a round bottomed flask was loaded 5 ml of DMSO and 5 ml dichloromethane. The mixture was cooled to −50˜−60° C. Then a mixture of 1 ml oxallyl chloride and 5 ml dichloromethane was injected in into the flask all at once. The mixture was stirred at the same temperature for another 5 minutes. 2-Hydroxymethyl-8,9-dihydro-6H-[1,2,4]triazolo[1,5-a]quinazolin-7-ethylene ketal (1.31 g, 5 mmol) in 20 ml dichloromethane was added within 2 minutes. The mixture was stirred at −50˜−60° C. for fifteen minutes and 0.7 ml triethylamine was next added. After another five minutes the reaction media was warmed up to 23° C. and a mixture of 20 ml water and 200 ml dichloromethane was added. The organic layer was dried over magnesium sulfate. Filter off the drying agent and concentrate the filtrate yielded 910 mg of product (70%). MS: 261(M+H). H-NMR(CDCl3): δ 10.26(s, 1H), 8.66(s, 1H), 4.08(s, 4H, OCH2CH2O), 3.49(t, 2H, J=6.9 Hz), 3.11(s, 2H), 2.18 (t, 3H, CH3, J=6.9 Hz), 2.44 (m, 2H, CH2).

Step 3: Preparation of 4-nitrobenzyl (5R)-6-[(acetyloxy)(8′,9′-dihydro-6′H-spiro[1,3-dioxolane-2,7′-[1,2,4]triazolo[1,5-a]quinazolin]-2′-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate

7-Ethyleneketal-6,7,8,9-tetrahydro-[1,2,4]triazolo[1,5-a]quinazoline-2-carbaldehyde (780 mg, 3 mmol) and the dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (1.15 g g, 3 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂: O(Et)₂ (1.2 g, 3.0 mmol)under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereomers were taken to the next step. Pale yellow amorphous solid; Yield: 300 mg, 15%; (M+H) 688.8.

Step 4: Preparation of Preparation of (5R,6Z)-6-(8′,9′-dihydro-6′H-spiro[1,3-dioxolane-2,7′-[1,2,4]triazolo[1,5-a]quinazolin]-2′-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

4-nitrobenzyl (5R)-6-[(acetyloxy)(8′,9′-dihydro-6′H-spiro[1,3-dioxolane-2,7′-[1,2,4]triazolo[1,5-a]quinazolin]-2′-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (300 mg, 0.43 mmol) was dissolved in THF (20 mL) and acetonitrile (20 mL) and phophate buffer (6.5 pH) (20 ml) and hydrogenated over Pd/C (10%) (200 mg) under 40 psi pressure. At the end, reaction mixture was filtered, cooled to 3° C., and 0.1 N NaOH was added to adjust the pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give a yellow precipitate. The product was purified by HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 L) and latter with 10% acetonitrile:water. The fractions containing the product were collected and concentrated under reduced pressure at room temperature. The yellow solid was washed with acetone, filtered and dried. Yield: 15 mg, 9%; Yellow crystals; mp>250° C. (Dec); (M+H+Na) 435.9. ¹H NMR (DMSO-d₆) δ 8.50 (s, 1H), 6.97(s, 1H), 6.85(s, 1H), 6.38(s, 1H), 4.05 (s, 4H, OCH2CH2O), 3.28(m, 2H), 3.07 (s, 2H), 2.13(t, 3H, CH3, J=4.8 Hz).

Example 25 Preparation of (5R,6Z)-6-[(5-methyl-6,7,8,9-tetrahydro[1,2,4]triazolo[1,5-a]quinazolin-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt

Step 1: Preparation of (5-Methyl-6,7,8,9-tetrahydro-[1,2,4]triazolo[1,5-a]quinazolin-2-yl)-methanol:

To a round bottomed flask was loaded 4.2 grams of 2-acetylcyclohexanone, 3.52 grams of (5-Amino-1H-[1,2,4]triazol-3-yl)-methanol and 50 ml 2-methoxyethanol. The mixture was refluxed for 18 hours. Then it was cooled down to 23° C. and concentrated to 5 ml. Then 50 ml ethyl ether was added and the precipitate was filtered and vacuum dried to yielded 3.32 grams of product Yield. 49%. This compound was used directly for the next step. MS: 219.2(M+H). H-NMR(DMSO): δ 5.49(t,1H, OH, J=6 Hz), 4.61 (d, 2H, J=6 Hz), 3.24 (m, 2H), 2.93 (m, 2H), 2.69 (s, 3H), 2.52 (s, 2H), 1.84 (m, 4H).

Step 2: Preparation of 5-Methyl-6,7,8,9-tetrahydro-[1,2,4]triazolo[1,5-a]quinazoline-2-carbaldehyde

To a round bottomed flask was loaded 1 ml of DMSO and 5 ml dichloromethane. The mixture was cooled to −50˜−60° C. Then a mixture of 1 ml oxallyl chloride and 2 ml dichloromethane was injected in into the flask all at once. The mixture was stirred at the same temperature for another 5 minutes. Then 0.218 grams of (5-Methyl-6,7,8,9-tetrahydro-[1,2,4]triazolo[1,5-a]quinazolin-2-yl)-methanol in 2 ml dichloromethane was added within 2 minutes. The mixture was stirred at −50˜−60° C. for fifteen minutes and 0.7 ml triethylamine was next added. After another five minutes the reaction media was warmed up to 23° C. and a mixture of 20 ml water and 200 ml dichloromethane was added. The organic layer was dried over magnesium sulfate. Filter off the drying agent and concentrate the filtrate yielded 0.216 grams of product (99%). MS: 217.1(M+H). H-NMR(CDCl3): δ 10.20(s, 1H), 3.23(m, 2H), 2.78 (m, 2H) 2.63 (s, 3H, CH3), 2.00 (m, 4H),

Step 3: Preparation of 4-nitrobenzyl (5R)-6-[(acetyloxy)(5-methyl-6,7,8,9-tetrahydro[1,2,4]triazolo[1,5-a]quinazolin-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate

5-Methyl-6,7,8,9-tetrahydro-[1,2,4]triazolo[1,5-a]quinazoline-2-carbaldehyde (432 mg, 2 mmol) and the dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (770 mg, 2 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂: O(Et)₂ (1.2 g, 3.0 mmol)under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereomers were taken to the next step. Pale yellow amorphous solid; Yield: 600 mg, 47%; (M+H) 644.7.

Step 4: Preparation of Preparation of (5R,6Z)-6-[(5-methyl-6,7,8,9-tetrahydro[1,2,4]triazolo[1,5-a]quinazolin-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

4-nitrobenzyl (5R)-6-[(acetyloxy)(5-methyl-6,7,8,9-tetrahydro[1,2,4]triazolo[1,5-a]quinazolin-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (600 mg, 0.93 mmol) was dissolved in THF (20 mL) and acetonitrile (20 mL) and phophate buffer (6.5 pH) (20 ml) and hydrogenated over Pd/C (10%) (200 mg) under 40 psi pressure. At the end, reaction mixture was filtered, cooled to 3° C., and 0.1 N NaOH was added to adjust the pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give a yellow precipitate. The product was purified by HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 L) and latter with 10% acetonitrile:water. The fractions containing the product were collected and concentrated under reduced pressure at room temperature. The yellow solid was washed with acetone, filtered and dried. Yield: 37 mg, 11%; as yellow crystals; mp 250° C. (Dec); (M+H+Na) 392. ¹H NMR (DMSO-d₆) δ 6.90 (s, 1H), 6.85(s, 1H), 6.28(s,1H), 2.98(m, 2H), 2.77 (m, 2H), 2.55(m, 3H), 1.78(m, 4H).

Example 26 Preparation of (5R,6Z)-6-[(5-methoxy-7,8-dihydro-6H-cyclopenta[e]imidazo[1,2-a]pyrimidin-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt,

Step 1: Preparation of 4-methoxy-6,7-dihydro-5H-cyclopentapyrimidin-2-ylamine

(SM:Ross, L. O.; Goodman, L.; Baker, B. R. J. Am. Chem. Soc. 1959, 81, 3108)

5.3 grams of 4-chloro-6,7-dihydro-5H-cyclopentapyrimidin-2-ylamine was dissolved in 200 ml xylene and 30 ml absolute methanol. Then 5.4 gram for sodium methoxide was added and the mixture was refluxed for 3 hours. Then the solvent was removed in vacuo and 100 ml water was added to the residue. Filter and wash the cake with water (50 ml). The solid was further vacuumed to dry for several hours. The desired product weighed 4.8 gram (98% yield). Mp: 133.8-134.9° C.; MS: 166.2.0 (M+H)

Step 2: Preparation of 5-methoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacene-2-carboxylic acid ethyl ester

4.8 gram (29 mmol) 4-ethoxy-6,7-dihydro-5H-cyclopentapyrimidin-2-ylamine was dissolved in 100 ml dry THF. Bromopyruvate (5.4 ml,) was then added dropwise with in five minutes. The mixture was stirred at 23° C. for one hour. It was then filtered and washed with ether to give 8.7 gram of solid. This solid was then dissolved in 50 ml ethanol and refluxed for two hours. The reaction mixture was cooled to room temperature and partitioned between 350 ml chloroform and 200 ml saturated sodium bicarbonate. The organic layer was separated and dried over magnesium sulfate. Filter off the drying agent and concentrate to give 5.3 gram of product (70% Yield). MP: 105-106° C. (M+H) 262.

Step 3: Preparation of 5-methoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacene-2-carbaldehyde

5.2 grams (19.8 mmol) 5-methoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacene-2-carboxylic acid ethyl ester was dissolved in 40 ml dichloromethane and then cooled to −78° C. DIBAL (1 M, 30 ml, 1.5 eq.) was then added within five minutes. The reaction media was then quenched with 2 ml ethanol and partitioned between 350 ml dichloromethane and 100 ml 1 N sodium hydroxide. The aqueous layer was washed with another 150 ml chloroform and the combined organic layer was dried over magnesium sulfate and filtered and concentrated to give the corresponding alcohol. The alcohol is then dissolved in 150 ml dichloromethane and 10 grams of manganese dioxide is then added. The mixture was stirred at 23° C. for two hours. The reaction mixture was then filtered through a pad of celite and concentrated to give 1.1 gram (68%) of the desired aldehyde. MP: 235.2-236.3° C.; MS: 218.1(M+H)

Step 4: Preparation of 6-[acetoxy-(5-methoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacen-2-yl)-methyl]-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester

A 30 ml acetonitrile solution of 5-methoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacene-2-carbaldehyde (660 mg, 3 mmol) was added 1.03 gram of magnesium bromide etherate. The mixture was stirred at 23° C. for half an hour. Then a 30 ml dry THF solution of the 6-Bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (1.155 gram, 1 eq.) was injected within a minute and the reaction mixture was then cooled to −20° C. Triethylamine (0.7 ml, eq.) was then injected and the reaction mixture was stirred for five hours at −20° C. Then acetic anhydride (0.377 ml, eq.) was injected and the reaction mixture was left at zero degree for 18 hours. The reaction media was then diluted with 400 ml ethyl acetate and washed with 100 ml 5% citric acid, 100 ml saturated sodium bicarbonate, and 100 ml brine. The organic layer was then dried over magnesium sulfate, filtered and concentrated. Flash column chromatography using 20% ethyl acetate in hexane gave 1.8 gram product. (93% Yield); MP: 118.7-119.1° C.; MS: 645.9(M+H)

Step 5: Preparation of 6-(5-methoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacen-2-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid

6-[acetoxy-(5-methoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacen-2-yl)-methyl]-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (966 mg, 1.4 mmol) was suspended in 20 ml THF and 20 ml pH=6.5 aqueous phosphate buffer. The mixture was then subjected to 45 psi hydrogen for two hours. Then it was filtered through a pad of celite and concentrated in vacuo to remove most of the THF. The solution was then cooled to zero degree and basified to pH=8 with 1 N sodium hydroxide. Then it was purified via reverse phase HPLC using 1 liter of water followed by 5%-25% acetonitrile and water. Water was then removed through concentrate in vacuo and 100 mg of product was collected.

MP: >250° C.

H-NMR: (300 MHz, D₂O) δ 10.12 (s, 1H), 9.29(s, 1H), 8.81 (s, 1H), 8.78(s, 1H), 6.19 (s, 3H), 5.36(m, 2H), 5.05 (m, 2H), 4.43 (m, 2H); MS: 371.2 (M+H).

Example 27 Preparation of (5R,6Z)-6-((5-[2-(benzyloxy)ethoxy]-7,8-dihydro-6H-cyclopenta[e]imidazo[1,2-a]pyrimidin-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt

Step 1: Preparation of 4-benzyloxyethoxy-6,7-dihydro-5H-cyclopentapyrimidin-2-ylamine

(SM:Ross, L. O.; Goodman, L.; Baker, B. R. J. Am. Chem. Soc. 1959, 81, 3108)

To stirred suspension of NaH (60% 552 mg) in THF 2-benzyloxyethanol (3.38 g, 20 mmol) was slowly added at room temperature. After the addition, 3.28 grams (19.4 mmol) of 4-chloro-6,7-dihydro-5H-cyclopentapyrimidin-2-ylamine was dissolved in 200 ml THF and added to it and the mixture was refluxed for 3 hours. Then the solvent was removed in vacuo and 100 ml water was added to the residue. The product was extracted with chloroform; washed well with water and dried over anhydrous MgSO₄. It was filtered and concentrated. Low melting solid; Yield: 4.2 gram (73%); (M+H) 286.1

Step 2: Preparation of 5-benzyloxyethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacene-2-carboxylic acid ethyl ester

6.0 gram (21 mmol) of 4-benzyloxyethoxy-6,7-dihydro-5H-cyclopentapyrimidin-2-ylamine was dissolved in 100 ml dry THF. Bromopyruvate (8 ml,) was then added dropwise with in five minutes. The mixture was stirred at 23° C. for one hour. It was then filtered and washed with ether to give a solid. This solid was then dissolved in 50 ml ethanol and refluxed for two hours. The reaction mixture was cooled to room temperature and partitioned between 350 ml chloroform and 200 ml saturated sodium bicarbonate. The organic layer was separated and dried over magnesium sulfate. Filter off the drying agent and concentrate to give 5.36 gram of product (67% Yield). (M+H) 382.1

Step 3: Preparation of 5-benzyloxyethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacene-2-carbaldehyde

3.81 grams (10 mmol) 5-benzyloxyethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacene-2-carboxylic acid ethyl ester was dissolved in 40 ml dichloromethane and then cooled to −78° C. DIBAL (1 M, 30 ml, 1.5 eq.) was then added within five minutes. The reaction media was then quenched with 2 ml ethanol and partitioned between 350 ml dichloromethane and 100 ml 1 N sodium hydroxide. The aqueous layer was washed with another 150 ml chloroform and the combined organic layer was dried over magnesium sulfate and filtered and concentrated to give the corresponding alcohol. The alcohol is then dissolved in 150 ml dichloromethane and 10 grams of manganese dioxide is then added. The mixture was stirred at 23° C. for two hours. The reaction mixture was then filtered through a pad of celite and concentrated to give 2.25 gram (67%) of the desired aldehyde. MS: 338(M+H)

Step 4: Preparation of 6-[acetoxy-(5-[2-(benzyloxy)emethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacen-2-yl)-methyl]-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester

A 30 ml acetonitrile solution of 5-benzyloxyethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacene-2-carbaldehyde (676 mg, 2 mmol) was added 1.03 gram of magnesium bromide etherate. The mixture was stirred at 23° C. for half an hour. Then a 30 ml dry THF solution of the 6-Bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (770 mg, 2 mmol) was injected within a minute and the reaction mixture was then cooled to −20° C. Triethylamine (0.7 ml, eq.) was then injected and the reaction mixture was stirred for five hours at −20° C. Then acetic anhydride (0.377 ml, eq.) was injected and the reaction mixture was left at zero degree for 18 hours. The reaction media was then diluted with 400 ml ethyl acetate and washed with 100 ml 5% citric acid, 100 ml saturated sodium bicarbonate, and 100 ml brine. The organic layer was then dried over magnesium sulfate, filtered and concentrated. Flash column chromatography using 20% ethyl acetate in hexane gave 1.05 gram product. (68% Yield); MS: 765.8(M+H)

Step 5: Preparation of Preparation of (5R,6Z)-6-((5-[2-(benzyloxy)ethoxy]-7,8-dihydro-6H-cyclopenta[e]imidazo[1,2-a]pyrimidin-2-yl)methylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

6-[acetoxy-(5-[2-(benzyloxy)emethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacen-2-yl)-methyl]-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (966 mg, 1.2 mmol) was suspended in 20 ml THF and 20 ml pH=6.5 aqueous phosphate buffer. The mixture was then subjected to 45 psi hydrogen for two hours. Then it was filtered through a pad of celite and concentrated in vacuo to remove most of the THF. The solution was then cooled to zero degree and basified to pH=8 with 1 N sodium hydroxide. Then it was purified via reverse phase HPLC using 1 liter of water followed by 5%-25% acetonitrile and water. Water was then removed through concentrate in vacuo and 100 mg of product was collected. MP: >250° C.; H-NMR(DMSO): □ 7.66(s, 1H), 7.36(s, 1H), 7.08(m, 5H), 6.87(s,1H), 6.85(s, 1H), 4.37 (m, 2H), 4.29 (m, 2H, CH2), 3.65 (m, 2H, CH2), 2.73 (m, 2H, CH2), 2.46 (m, 2H, CH2), 2.02 (m, 2H, CH2). MS: 491.1 (M+H).

Example 28 Preparation of (5R,6Z)-6-(2,3-dihydro[1,3]thiazolo[3,2-a]benzimidazol-6-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt

Step 1: Preparation of (2,3-Dihydro-benzo[4,5]imidazo[2,1-b]thiazol-7-yl)-methanol

To a round bottomed flask was added 2.83 grams of 2-Thioxo-2,3-dihydro-1H-benzoimidazole-5-carboxylic acid methyl ester, 2.55 grams of dibromoethane and 50 ml DMF and 50 ml ethanol. The mixture was refluxed for 10 hours. Then it was concentrated to dry on a rotary evaporator. The solid was next dissolved in 100 ml THF and 20 ml of 1M LiAlH₄ (in THF) was next injected within five minutes. The reaction media was stirred at room temperature for one hour. Ethanol was next added (˜10 ml), followed by 50 ml 2N HCl. The aqueous layer was adjusted to basic Ph=14 with 10N sodium hydroxide. The aqueous was extracted with 2×500 ml ethyl acetate. The combined organic layers was dried over magnesium sulfate. Filter off the drying agent and cocentrate yielded 2.04 grams (60%) product. MS: 207.0(M+H). H-NMR(DMSO): □ 7.34(m, 2H), 7.08 (m, 1H), 5.15(m, 1H, OH), 4.53 (m, 2H, CH2), 4.34 (m, 2H, CH2), 4.00 (m, 2H, CH2).

Step 2: Preparation of 2,3-Dihydro-benzo[4,5]imidazo[2,1-b]thiazole-7-carbaldehyde

To a pre-cooled (−50˜−60° C.) mixture of 1.7 ml DMSO and 5 ml dichloromathane was injected a 20 ml dichloromethane solution of 1 ml oxallyl chloride within five minutes. The mixture was stirred for another five minutes at the same temperature. Then 1.9 grams of 2,3-Dihydro-benzo[4,5]imidazo[2,1-b]thiazol-7-yl)-methanol in a mixture of 20 ml dichloromethane and 20 ml THF was injected within 2 minutes. The mixture was kept stirred at −50˜−60° C. for 15 minutes. Then 7 ml triethylamine was injected all at once and after another 5 minutes the cooling bath was removed and the reaction was warmed up to room temperature by itself. Water (100 ml) was next added and the reaction media was extracted with 2×200 ml ethyl acetate. The combined organic layers was dried over magnesium sulfate. Filter off the drying agent and concentrate gave 1.2 grams product (64%). MS: 205.0(M+H). H-NMR(CDCl3): □ 9.98(m, 1H), 7.67 (m, 2H), 7.17 (m, 1H), 4.33(m, 2H), 3.99 (m, 2H, CH2).

Step 3: Preparation of 6-Acetoxy-(2,3-dihydro-benzo[4.5]imidazo[2,1-b]thiazol-6-yl)-methyl]-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester

A 30 ml acetonitrile solution of 2,3-Dihydro-benzo[4,5]imidazo[2,1-b]thiazole-7-carbaldehyde (610 mg, 2 mmol) was added 1.03 gram of magnesium bromide etherate. The mixture was stirred at 23° C. for half an hour. Then a 30 ml dry THF solution of the 6-Bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (770 mg, 2 mmol) was injected within a minute and the reaction mixture was then cooled to −20° C. Triethylamine (0.7 ml, eq.) was then injected and the reaction mixture was stirred for five hours at −20° C. Then acetic anhydride (0.377 ml, eq.) was injected and the reaction mixture was left at zero degree for 18 hours. The reaction media was then diluted with 400 ml ethyl acetate and washed with 100 ml 5% citric acid, 100 ml saturated sodium bicarbonate, and 100 ml brine. The organic layer was then dried over magnesium sulfate, filtered and concentrated. Flash column chromatography using 20% ethyl acetate in hexane gave 690 mg product. (54% Yield); MS: 630.8(M+H)

Step 4: Preparation of (5R,6Z)-6-(2,3-dihydro[1,3]thiazolo[3,2-a]benzimidazol-6-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

6-[Acetoxy-(2,3-dihydro-benzo[4,5]imidazo[2,1-b]thiazol-6-yl)-methyl]-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (690 mg, 1.1 mmol) was suspended in 20 ml THF and 20 ml pH=6.5 aqueous phosphate buffer. The mixture was then subjected to 45 psi hydrogen for two hours. Then it was filtered through a pad of celite and concentrated in vacuo to remove most of the THF. The solution was then cooled to zero degree and basified to pH=8 with 1 N sodium hydroxide. Then it was purified via reverse phase HPLC using 1 liter of water followed by 5%-25% acetonitrile and water. Water was then removed through concentrate in vacuo and 32 mg of product (Yield 3%) was collected. MP: >250° C.; H-NMR(D₂O): □ 7.08(m, 6H), 7.36(s, 1H), 4.05(m, 2H), 3.90(b, 1H); MS: 358.3 (M+H).

Example 29 Preparation of (5R,6Z)-6-(3,4-dihydro-2H-[1,3]thiazino[3,2-a]benzimidazol-7-ylmethylene)-7oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt

Step 1: Preparation of (3,4-Dihydro-2H-1-thia-4a,9-diaza-fluoren-6-yl)-methanol

To a round bottomed flask was added 4.06 grams of 2-Thioxo-2,3-dihydro-1H-benzoimidazole-5-carboxylic acid methyl ester, 4.04 grams of 1,3-dibromopropane and 50 ml DMF and 50 ml ethanol. The mixture was refluxed for 10 hours. Then it was concentrated to dry on a rotary evaporator. The solid was next dissolved in 100 ml THF and 20 ml of 1M LiAlH₄ (in THF) was next injected within five minutes. The reaction media was stirred at room temperature for one hour. Ethanol was next added (˜10 ml), followed by 50 ml 2N HCl. The aqueous layer was adjusted to basic Ph=14 with 10N sodium hydroxide. The aqueous was extracted with 2×500 ml ethyl acetate. The combined organic layers was dried over magnesium sulfate. Filter off the drying agent and cocentrate yielded 3 grams (68%) product. NMR(DMSO): δ 7.91(m, 3H), 4.13 (m, 2H), 3.93(s,1H), 3.23 (m, 2H, CH2), 2.48 (m, 2H, CH2). MS: 221.0(M+H).

Step 2: Preparation of 3,4-Dihydro-2H-1-thia-4a,9-diaza-fluorene-6-carbaldehyde

To a round bottomed flask was loaded 1.1 grams of (3,4-Dihydro-2H-1-thia-4a,9-diaza-fluoren-6-yl)-methanol, 6 grams of manganese dioxide and 250 ml chloroform. The mixture was stirred for one hour at room temperature and then filtered through a pad of celite. This yielded 0.67 grams of product (61%). MS: 219.0(M+H). H-NMR(CDCl3): δ 10.04(s, 1H), 7.67 (m, 3H), 4.25 (m, 2H), 3.27(m, 2H), 2.50 (m, 2H).

Step 3: Preparation of 4-nitrobenzyl (5R)-6-[(acetyloxy)(3,4-dihydro-2H-[1,3]thiazino[3,2-a]benzimidazol-7-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate

A 30 ml acetonitrile solution of 3,4-Dihydro-2H-1-thia-4a,9-diaza-fluorene-6-carbaldehyde (660 mg, 3 mmol) was added 1.03 gram of magnesium bromide etherate. The mixture was stirred at 23° C. for half an hour. Then a 30 ml dry THF solution of the 6-Bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (1.15 g, 3 mmol) was injected within a minute and the reaction mixture was then cooled to −20° C. Triethylamine (0.7 ml, eq.) was then injected and the reaction mixture was stirred for five hours at −20° C. Then acetic anhydride (0.377 ml, eq.) was injected and the reaction mixture was left at zero degree for 18 hours. The reaction media was then diluted with 400 ml ethyl acetate and washed with 100 ml 5% citric acid, 100 ml saturated sodium bicarbonate, and 100 ml brine. The organic layer was then dried over magnesium sulfate, filtered and concentrated. Flash column chromatography using 20% ethyl acetate in hexane gave 690 mg product. (36% Yield); MS: 644.9(M+H)

Step 4: Preparation of (5R,6Z)-6-(3,4-dihydro-2H-[1,3]thiazino[3,2-a]benzimidazol-7-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

4-nitrobenzyl (5R)-6-[(acetyloxy)(3,4-dihydro-2H-[1,3]thiazino[3,2-a]benzimidazol-7-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (700 mg, 1.1 mmol) was suspended in 20 ml THF and 20 ml pH=6.5 aqueous phosphate buffer. The mixture was then subjected to 45 psi hydrogen for two hours. Then it was filtered through a pad of celite and concentrated in vacuo to remove most of the THF. The solution was then cooled to zero degree and basified to pH=8 with 1 N sodium hydroxide. Then it was purified via reverse phase HPLC using 1 liter of water followed by 5%-25% acetonitrile and water. Water was then removed through concentrate in vacuo and 75 mg of product (Yield 18%) was collected. MP: >250° C.; H-NMR(D₂O): δ 7.08(m, 6H), 3.70(m, 2H), 4.05(m, 2H), 3.13(m, 2H), 2.22(m, 2H); MS: 372.1(M+H).

Example 30 Preparation of (5R,6Z)-7-oxo-6-([1,3]thiazolo[3,2-a]benzimidazol-6-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxyilc acid, sodium salt

Step 1: Preparation of Benzo[4,5]imidazo[2,1-b]thiazole-6-carboxylic acid methyl ester

To a round bottomed flask was loaded with 3.3 grams of 2-Thioxo-2,3-dihydro-1H-benzoimidazole-5-carboxylic acid methyl ester, 4.5 ml alpha-bromodiethylacetal, 50 ml DMF. The mixture was refluxed for 10 hours. Then is was poured into 10% sat. sodium bicarbonate (100 ml) and extracted with 2×100 ml ethyl acetate. The combined organic layers were dried over magnesium sulfate. Filter off the drying agent, concentrate to dry, flash column chromatography using 10-30% ethyl acetate/hexane yielded 1.16 grams (32%) crude product. MS: 233.1(M+H). H-NMR(DMSO): δ 7.78(m, 5H), 2.04 (s, 3H, CH3).

Step 2: Preparation of Benzo[4,5]imidazo[2,1-b]thiazole-6-carbaldehyde

To a round bottomed flask was loaded 1.16 grams of (3,4-Dihydro-2H-1-thia-4a,9-diaza-fluoren-6-yl)-methanol, 25 grams of manganese dioxide and 250 ml chloroform. The mixture was stirred for one hour at room temperature and then filtered through a pad of celite. This yielded 0.42 grams of product (42%). MS: 203.0(M+H). H-NMR(CDCl3): δ 10.10(ss, 1H), 8.24 (ss, 1H), 7.85 (m, 3H), 6.96 (m, 1H).

Step 3: Preparation of 4-nitrobenzyl (5R)-6-[(acetyloxy)([1,3]thiazolo[3,2-a]benzimidazol-6-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate

A 30 ml acetonitrile solution of benzo[4,5]imidazo[2,1-b]thiazole-6-carbaldehyde (404 mg, 2 mmol) was added 1.03 gram of magnesium bromide etherate. The mixture was stirred at 23° C. for half an hour. Then a 30 ml dry THF solution of the 6-Bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (770 mg, 2 mmol) was injected within a minute and the reaction mixture was then cooled to −20° C. Triethylamine (0.7 ml, eq.) was then injected and the reaction mixture was stirred for five hours at −20° C. Then acetic anhydride (0.377 ml, eq.) was injected and the reaction mixture was left at zero degree for 18 hours. The reaction media was then diluted with 400 ml ethyl acetate and washed with 100 ml 5% citric acid, 100 ml saturated sodium bicarbonate, and 100 ml brine. The organic layer was then dried over magnesium sulfate, filtered and concentrated. Flash column chromatography using 20% ethyl acetate in hexane gave 630 mg product. (50% Yield); MS: 631.9(M+H)

Step 4: Preparation of (5R,6Z)-7-oxo-6-([1,3]thiazolo[3,2-a]benzimidazol-6-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

4-nitrobenzyl (5R)-6-[(acetyloxy)([1,3]thiazolo[3,2-a]benzimidazol-6-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (630 mg, 1 mmol) was suspended in 20 ml THF and 20 ml pH=6.5 aqueous phosphate buffer. The mixture was then subjected to 45 psi hydrogen for two hours. Then it was filtered through a pad of celite and concentrated in vacuo to remove most of the THF. The solution was then cooled to zero degree and basified to pH=8 with 1 N sodium hydroxide. Then it was purified via reverse phase HPLC using 1 liter of water followed by 5%-25% acetonitrile and water. Water was then removed through concentrate in vacuo and 33 mg of product (Yield 8%) was collected. MP: >250° C.; H-NMR(D₂O): δ 6.89(m, 8H), 5.22(s, 2H), 5.02(s, 2H), 4.81 (s, 2H). MS: 378.1(M+H+Na).

Example 31 Preparation of (5R,6Z)-6-(7,8-dihydro-5H-pyrano[4,3-d]pyrazolo[5,1-b][1,3]oxazol-2-ylmethylene)7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt

Step 1: Preparation of ethyl-5-[(4-oxotetrahydro-2H-pyran-3-yl)oxy]-1H-Pyrazole-3-carboxylate:

To the stirred suspension of ethyl 5-hydroxy-1H-pyrazole-3-carboxylate (7.0 g, 45 mmol) and 24.9 g g of potassium carbonate in 500 ml of acetonitrile was added 8.0 g of 3-bromo-tetrahydro-pyran-4-one, and refluxed for 16 hours. The reaction mixture was allowed to cool to room temperature, then filtered, the solid was washed with acetonitrile. The filtrate was concentrated to an oil. The residue was dissolved in ethyl acetate and extracted with water. The organic phase was dried over MgSO₄ and evaporated to dryness. 9.0 g (78%) of the desired product was obtained as a white solid. M.Pt. 121-123° C.; (M+H) 255.

Step 2: Preparation of ethyl 7,8-dihydro-5H-pyrano[4,3-d]pyrazolo[5,1-b][1,3]oxazole-2-carboxylate:

A mixture of ethyl-5-[(4-oxotetrahydro-2H-pyran-3-yl)oxy]-1H-pyrazole-3-carboxylate (254 mg, 1 mmol) and methane sulfonic acid (192 mg) in 7 ml of acetic acid and toluene (50 ml) was refluxed for 18 hours using a Dean-Stark trap to remove water. The reaction mixture was allowed to cool to room temperature. The reaction mixture was filtered. The filtrate was concentrated to an oil. The residue was dissolved in ethyl acetate aqueous bicarbonate solution. The organic layer was washed with water and dried over MgSO₄. After removal of the ethyl acetate, the residue was purified by silica gel chromatography eluting with ethyl acetate/hexane to give 120 mg (51%) of the desired product as white solid. Mp; 116-118° C.; Electrospray-MS m/z 237.0 (M+H)+

Step 3: Preparation of 7,8-dihydro-5H-pyrano[4,3-d]pyrazolo[5,1-b][1,3]oxazol-2-ylmethanol:

To the stirred solution of 7,8-dihydro-5H-pyrano[4,3-d]pyrazolo[5,1-b][1,3]oxazole-2-carboxylate (1.5 g, 6.3 mmol) of in 100 ml of THF was added 1.05 g of lithium borohydride and 1.54 g of methanol. The solution was heated at 40C for 2.5 hour. The reaction was quenched by 1N HCl, and adjusted to pH 1.3 and stirred at room temperature for 1 hour. The reaction mixture was adjusted pH to 8 with k₂CO₃. The reaction mixture was extracted with ethyl acetate. The organic layer was dried over MgSO₄, and concentrated to an oil and column chromatographyed to give 0.74 g of the desired product (60%). (M+H) 196.

Step 4: Preparation of 7,8-dihydro-5H-pyrano[4,3-d]pyrazolo[5,1-b][1,3]oxazol-2-carbaldehyde:

To the stirred solution of 7,8-dihydro-5H-pyrano[4,3-d]pyrazolo[5,1-b][1,3]oxazol-2-ylmethanol (1.0 g, 5.1 mmol) in 60 ml of CHCl₃ was added 8 g of MnO₂. Th suspension was refluxed for 1.5 hour under a nitrogen atmosphere. The reaction mixture was filtered through a pad of Celite. The filtrate was concentrated to give yellow oil. The product was purified by chromatography. 0.79 g of the product was obtained (80%); (M+H) 193

Step 5: 4-Nitrobenzy (5R)-6-[(acetyloxy)(7,8-dihydro-5H-Pyrano[4,3]pyrazolo[5,1-b][1,3]oxazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate

7,8-dihydro-5H-pyrano[4,3-d]pyrazolo[5,1-b][1,3]oxazol-2-carbaldehyde (600 mg, 3.1 mmol) and the dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (1.54 g, 4.6 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂: O(Et)₂ (2.21 g, 8.5 mmol)under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereo isomers were taken to next step. Pale yellow amorphous solid; Yield: 1.35 g, 70%; (M+H) 619.

Step 6: Preparation of (5R,6Z)-6-(7,8-dihydro-5H-pyrano[4,3-d]pyrazolo[5,1-b][1,3]oxazol-2-ylmethylene)7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt & (5R,6E)-6-(7,8-dihydro-5H-pyrano[4,3-d]pyrazolo[5,1-b]1,3]oxazol-2-ylmethylene)7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt

4-Nitrobenzy (5R)-6-[(acetyloxy)(7,8-dihydro-5H-pyrano[4,3]pyrazolo[5,1-b][1,3]oxazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (1.2 g, 1.9 mmol) was dissolved in THF (20 mL), acetonitrile (10 mL) and 0.5 M phosphate buffer (pH 6.5, 28 mL) and hydrogenated over 10% Pd/C at 40 psi pressure. After 4 hrs the reaction mixture was filtered, cooled to 3° C., and 0.1 M NaOH was added to adjust pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 350C to give yellow precipitate. The product was purified by HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 lits) and latter with 10% acetonitrile: Water. The fractions containing the product were collected and concentrated at reduced pressure at room temperature. The yellow solid was washed with acetone and filtered. In this reaction both E and Z isomers were formed and they were separated by prep. HPLC. (5R,6Z)-6-(7,8-dihydro-5H-pyrano[4,3-d]pyrazolo[5,1-b][1,3]oxazol-2-ylmethylene)₇-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt: Yield 87 mg, (25%); Yellow solid; (M+H+Na) 368.2.

H-NMR (D₂O): 7.04 (1H, s), 7.01 (1H, s), 6.45 (1H, s), 6.09 (1H, s), 4.76 (2H, m), 4.12 (2H, m), 2.96 (2H, m).

(5R,6E)-6-(7,8-dihydro-5H-pyrano[4,3-d]pyrazolo[5,1-b][1,3]oxazol-2-ylmethylene)₇-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt: Yield 75 mg, (21%); Yellow solid; (M+H+Na) 368.2.

H-NMR (D₂O): 7.08 (1H, s), 6.81 (1H, s), 6.71 (1H, s), 6.40 (1H, s), 4.68 (2H, m), 4.03 (2H, m), 2.87 (2H, m).

Example 32 Preparation of (5R,6Z)-7-oxo-6-(5,6,7,8-tetrahydropyrazolo[5,1-b][1,3]benzoxazol-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt

Step 1: Preparation of ethyl-5-[(2-oxocyclohexyl)oxy]-1H-pyrazole-3-carboxylate:

To the stirred suspension of ethyl 5-hydroxy-1H-pyrazole-3-carboxylate (6.25 g, 40 mmol) and 22.1 g of potassium carbonate in 500 ml of acetonitrile was added 6.35 g of 2-chlorocyclohexanone, and refluxed for 16 hours. The reaction mixture was allowed to cool to room temperature, then filtered, the solid was washed with acetonitrile. The filtrate was concentrated to an oil. The residue was dissolved in ethyl acetate and extracted with water. The organic phase was dried over MgSO₄ and evaporated to dryness. The product was purified by silics-gel column chromatography by eluting it with 1:1 ethyl acetaet;hexane. 4.92 g (49%) of the desired product was obtained as a white solid. M.Pt. 122-124° C.; (M+H) 253.

Step 2: Preparation of ethyl 5,6,7,8-tetrahydropyrazolo[5,1-b][1,3]benzoxazole-2-carboxylate:

A mixture of ethyl-5-[(2-oxocyclohexyl)oxy]-1H-pyrazole-3-carboxylate (127.6 mg, 0.5 mmol) and methane sulfonic acid (95 mg) in 5 ml of acetic acid and toluene (50 ml) was refluxed for 18 hours using a Dean-Stark trap to remove water. The reaction mixture was allowed to cool to room temperature. The reaction mixture was filtered. The filtrate was concentrated to an oil. The residue was dissolved in ethyl acetate and aqueous bicarbonate solution. The organic layer was washed with water and dried over MgSO₄. After removal of the ethyl acetate, the residue was purified by silica gel chromatography eluting with 1:1 ethyl acetate/hexane to give 69.7 mg (59%) of the desired product as white solid. Mp; 55-57° C.; Electrospray-MS m/z 235.0 (M+H)+

Step 3: Preparation of 5,6,7,8-tetraihydropyrazolo[5,1-b][1,3]benzoxazol-2-ylmethanol:

To the stirred solution of ethyl 5,6,7,8-tetrahydropyrazolo[5,1-b][1,3]benzoxazole-2-carboxylate (3.84 g, 16.4 mmol) of in 100 ml of THF was added 3.05 g of lithium borohydride and 3 ml of methanol. The solution was heated at 40C for 2.5 hour. The reaction was quenched by 1N HCl, and adjusted to pH 1.3 and stirred at room temperature for 1 hour. The reaction mixture was adjusted pH to 8 with k₂CO₃. The reaction mixture was extracted with ethyl acetate. The organic layer was dried over MgSO₄, and concentrated to an oil and column chromatographyed to give 2.62 g of the desired product (83%). Mpt. 82-84° C.; (M+H) 193.

Step 4: Preparation of 5,6,7,8-tetrahydropyrazolo[5,1-b][1,3]benzoxazole-2-carbaldehyde:

To the stirred solution of 5,6,7,8-tetraihydropyrazolo[5,1-b][1,3]benzoxazol-2-ylmethanol (2.30 g, 11.97 mmol) in 60 ml of CHCl₃ was added 10 g of MnO₂. Th suspension was refluxed for 1.5 hour under a nitrogen atmosphere. The reaction mixture was filtered through a pad of Celite. The filtrate was concentrated to give yellow solid. The product was purified by chromatography. 1.95 g of the product was obtained (85.5%); (M+H) 191

Step 5: 4-Nitrobenzy (5R)-6-[(acetyloxy)(5,67,8-tetrahydropyrazolo[5,1-b][1,3]benzoxazol-2-yl)methyl-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate

5,6,7,8-tetrahydropyrazolo[5,1-b][1,3]benzoxazole-2-carbaldehyde (589 mg, 3.1 mmol) and the dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (1.54 g, 4.6 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂: O(Et)₂ (2.21 g, 8.5 mmol)under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereo isomers were taken to next step. Pale yellow amorphous solid; Yield: 792 mg, 42%; M.pt. 160-162° C.; (M+H) 618.

Step 6: Preparation of (5R,6Z)-7-oxo-6-(5,6,7,8-tetrahydropyrazolo[5,1-b][1,3]benzoxazol-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt

4-Nitrobenzy (5R)-6-[(acetyloxy)(5,67,8-tetrahydropyrazolo[5,1-b][1,3]benzoxazol-2-yl)methyl-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (318 mg, 0.5 mmol) was dissolved in THF (20 mL), acetonitrile (10 mL) and 0.5 M phosphate buffer (pH 6.5, 28 mL) and hydrogenated over 10% Pd/C (100 mg) at 40 psi pressure. After 4 hrs the reaction mixture was filtered, cooled to 3° C., and 0.1 M NaOH was added to adjust pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give yellow precipitate. The product was purified by HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 lits) and latter with 10% acetonitrile: Water. The fractions containing the product were collected and concentrated at reduced pressure at room temperature. The yellow solid was washed with acetone and filtered. Yield 150 mg, (76%); Yellow solid; (M+H+Na) 365.2.

H-NMR (D₂O): δ 6.92 (1H, s), 6.91 (1H, s), 6.32 (1H, s), 5.85 (1H, s), 2.59 (4H, m), 1.80 (4H,m).

Example 33 Preparation of (5R,6Z)-6-{[6-(ethoxycarbonyl)-5,6,7,8-tetrahydropyrazolo[5′,1′:2,3][1,3]oxazolo[5,4-c]pyridin-2-yl]methylene}-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt

Step 1: Preparation of ethyl 3-{[3-ethoxycarbonyl)-1H-pyrazol-5-yl]oxy}-4-oxopiperidine-1-carboxylate:

To the stirred suspension of ethyl 5-hydroxy-1H-pyrazole-3-carboxylate (19.5 g, 127 mmol) and 50.0 g of potassium carbonate in 500 ml of acetonitrile was added 3-bromo-4-oxo-piperidine-1-carboxylic acid ethyl ester (37.45 g, 149 mmol), and refluxed for 16 hours. The reaction mixture was allowed to cool to room temperature, then filtered, the solid was washed with acetonitrile. The filtrate was concentrated to an oil. The residue was dissolved in ethyl acetate and extracted with water. The organic phase was dried over MgSO₄ and evaporated to dryness. The product was purified by silics-gel column chromatography by eluting it with 1:1 ethyl acetaet;hexane. 8.5 g (19%) of the desired product was obtained as an yellow oil. (M+H) 326.

Step 2: Preparation of diethyl 7,8-tetrahydropyrazolo[5′, 1′:2,3][1,3]oxazolo[5,4-c]pyridine-2,6(5H)-dicarboxylate:

A mixture of ethyl 3-{[3-ethoxycarbonyl)-1H-pyrazol-5-yl]oxy}-4-oxopiperidine-1-carboxylate (325 mg, 1 mmol) and methane sulfonic acid (95 mg) in 5 ml of acetic acid and toluene (50 ml) was refluxed for 18 hours using a Dean-Stark trap to remove water. The reaction mixture was allowed to cool to room temperature. The reaction mixture was filtered. The filtrate was concentrated to an oil. The residue was dissolved in ethyl acetate and aqueous bicarbonate solution. The organic layer was washed with water and dried over MgSO₄. After removal of the ethyl acetate, the residue was purified by silica gel chromatography eluting with 1:1 ethyl acetate/hexane to give 175 mg (57%) of the desired product as an yellow oil Electrospray-MS m/z 308.0 (M+H)+

Step 3: Preparation of ethyl 2-(hydroxymethyl)-7,8-dihydropyrazolo [5′, 1′:2,3][1,3]oxazolo[5,4-c]pyridine-6(5H)-carboxylate

To the stirred solution of diethyl 7,8-tetrahydropyrazolo[5′ 1′:2,3][1,3]oxazolo[5,4-c]pyridine-2,6(5H)-dicarboxylate (307 mg, 1 mmol) of in 40 ml of THF was added 305 mg of lithium borohydride and 1 ml of methanol. The solution was heated at 40C for 2.5 hour. The reaction was quenched by 1N HCl, and adjusted to pH 1.3 and stirred at room temperature for 1 hour. The reaction mixture was adjusted pH to 8 with k₂CO₃. The reaction mixture was extracted with ethyl acetate. The organic layer was dried over MgSO₄, and concentrated to an oil and column chromatographyed to give 172 mg of the desired product (65%); (M+H) 266.

Step 4: Preparation of ethyl 2-formyl-7,8-dihydropyrazolo [5′, 1′:2,3][1,3]oxazolo[5,4-c]pyridine-6(5H)-carboxylate

To the stirred solution of ethyl 2-(hydroxymethyl)-7,8-dihydropyrazolo [5′, 1′:2,3][1,3]oxazolo[5,4-c]pyridine-6(5H)-carboxylate (1.76 g, 6.6 mmol) in 60 ml of CHCl₃ was added 10 g of MnO₂. Th suspension was refluxed for 1.5 hour under a nitrogen atmosphere. The reaction mixture was filtered through a pad of Celite. The filtrate was concentrated to give yellow solid. The product was purified by chromatography. 1.43 g of the product was obtained (82%); M.pt: 97-99° C. (M+H) 264.

Step 5: Preparation of ethyl 2-[(acetyloxy)(5R)-6-bromo-2-Z{[(4-nitrobenzyl)oxy]carbonyl}-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-en-6-yl)methyl]-7,8-dihydropyrazolo[5′,1′:2,3][1,3]oxazolo[5,4-c]pyridine-6(5H)-carboxylate

Ethyl 2-formyl-7,8-dihydropyrazolo [5′,1′:2,3][1,3]oxazolo[5,4-c]pyridine-6(5H)-carboxylate (790 mg, 3. mmol) and the dry THF solution (20 mL) of (5R, 6S)-6-bromo-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester (1.54 g, 4.6 mmol) were added successively to the dry acetonitrile (15 mL) solution of anhydrous MgBr₂: O(Et)₂ (2.21 g, 8.5 mmol)under an argon atmosphere at room temperature. After cooling to −20° C., Et₃N (2.0 mL) was added in one portion. The reaction vessel was covered with foil to exclude light. The reaction mixture was stirred for 2 h at −20° C. and treated with acetic anhydride (1.04 mL) in one portion. The reaction mixture was warmed to 0° C. and stirred for 15 h at 0° C. The mixture was diluted with ethyl acetate and washed with 5% citric acid aqueous solution, saturated sodium hydrogen carbonate, and brine. The organic layer was dried (MgSO₄) and filtered through a pad of Celite. The pad was washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography, then the column was eluted with ethyl acetate:hexane (1:1). Collected fractions were concentrated under reduced pressure and the mixture of diastereo isomers were taken to next step. Pale yellow amorphous solid; Yield: 1.67 g, 81%; (M+H) 690.

Step 6: Preparation of (5R,6Z)-6-{[6-(ethoxycarbonyl)-5,6,7,8-tetrahydropyrazolo[5′,1′:2,3][1,3]oxazolo[5,4-c]pyridin-2-yl]methylene}-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt

Ethyl 2-[(acetyloxy)(5R)-6-bromo-2-Z{[(4-nitrobenzyl)oxy]carbonyl}-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-en-6-yl)methyl]-7,8-dihydropyrazolo[5′,1′:2,3][1,3]oxazolo[5,4-c]pyridine-6(5H)-carboxylate (828 mg, 0.5 mmol) was dissolved in THF (20 mL), acetonitrile (10 mL) and 0.5 M phosphate buffer (pH 6.5, 28 mL) and hydrogenated over 10% Pd/C (200 mg) at 40 psi pressure. After 4 hrs the reaction mixture was filtered, cooled to 3° C., and 0.1 M NaOH was added to adjust pH to 8.5. The filtrate was washed with ethyl acetate and the aqueous layer was separated. The aqueous layer was concentrated under high vacuum at 35° C. to give yellow precipitate. The product was purified by HP21 resin reverse phase column chromatography. Initially the column was eluted with deionized water (2 lits) and latter with 10% acetonitrile: Water. The fractions containing the product were collected and concentrated at reduced pressure at room temperature. The yellow solid was washed with acetone and filtered. Yield 375 mg, (71%); Yellow solid; (M+H+Na) 438.4.

H-NMR (D₂O): δ 6.96 (1H, s), 6.94 (1H, s), 6.41 (1H, s), 6.00 (1H, s), 4.53 (2H, m), 4.13 (2H,q), 3.78 (2H,m), 2.78 (2H, m), 1.21 (3H, t). 

1. A compound of formula I

wherein: one of A and B denotes hydrogen and the other an optionally substituted fused tricyclic heteroaryl group; X is S or O; R₅ is H, C1-C6 alkyl, C5-C6 cycloalkyl, or CHR₃OCOC1-C6alkyl; and R₃ is hydrogen, C1-C6 alkyl, C5-C6 cycloalkyl, optionally substituted aryl, or optionally substituted heteroaryl; or a pharmaceutically acceptable salt or in vivo hydrolysable ester thereof.
 2. The compound according to claim 1 wherein the tricyclic heteroarylgroup has the formula

wherein Z₁, Z₂, Z₃, Z₄, Z₅, Z₆ and Z₇ are independently CR₂, N, O, S or N—R₁ provided one of Z₁-Z₇ is a carbon atom to which the remainder of the molecule is attached; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and Y₁, Y₂, Y₃ and Y₄ may independently be C or N.
 3. The compound according to claim 1 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ and Z₈ are independently CR₂, N, O, S or N—R₁ provided one of the Z₁-Z₈ is a carbon atom to which the remainder of the molecule is attached; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₆R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and Y₁, Y₂, Y₃ and Y₄ are independently C or N.
 4. The compound according to claim 1 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ and Z₈ are independently CR₂, N, O, S or N—R₁ provided one of Z₁-Z₈ is a carbon atom to which the remainder of the molecule is attached; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and Y₁, Y₂, Y₃ and Y₄ may be C or N.
 5. The compound according to claim 1 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ and Z₉ are independently CR₂, N, O, S or N—R₁ provided one of the Z₁-Z₉ is a carbon atom to which the remainder of the molecule is attached; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and Y₁, Y₂, Y₃ and Y₄ are independently C or N.
 6. The compound according to claim 1 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃ and Z₄ are independently CR₂, N, O, S or N—R₁ provided one of Z₁-Z₄ is a carbon atom to which the remainder of the molecule is attached; Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁, W₂ and W₃ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryl oxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and t=1 to
 3. 7. The compound according to claim 1 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄ and Z₅ are independently CR₂, N, O, S or N—R₁ provided one of Z₁-Z₅ is a carbon atom to which the remainder of the molecule is attached; Y₁ and Y₂ are independently C or N; W₁, W₂ and W₃ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(r) n=0-2; and t=1 to
 3. 8. The compound according to claim 1 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₅ and Z₆ are independently CR₂, N, O, S, and N—R₁; provided one of Z₁-Z₆ is a carbon atom to which the remainder of the molecule is attached; Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁ and W₂ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and t=1 to
 3. 9. The compound according to claim 1 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₅, Z₆ and Z₇ are indepdently CR₂, N, O, S or N—R₁ provided one of the Z₁-Z₇ is a carbon atom to which the remainder of the molecule is attached; Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁ and W₂ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q), optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and t=0-3.
 10. The compound according to claim 1 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂ and Z₃ are independently CR₂ N, O, S or N—R₁ provided one of Z₁-Z₃ is a carbon atom to which the remainder of the molecule is attached; Y₁ and Y₄ are independently C or N; Y₂ and Y₃ are independently CH or N; W₁, W₂ W₃, W₄ and W₅ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C65 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; t=0 to 2; and u=1 to
 3. 11. The compound according to claim 1 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ and Z₉ are independently CR₂, N, O, S or N—R₁ provided one of the Z₁-Z₉ is a carbon atom to which the remainder of the molecule is attached; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q), optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and Y₁, Y₂, Y₃ and Y₄ are independently C or N.
 12. The compound according to claim 1 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈, Z₉ and Z₁₀ are independently CR₂, N, O, S or N—R₁ provided one of Z₁-Z₁₀ is a carbon atom to which the remainder of the molecule is attached; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and Y₁, Y₂, Y₃ and Y₄ are independently C or N.
 13. The compound according to claim 1 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄ and Z₅ are independently CR₂, N, O, S or N—R₁ provided that one of Z₁-Z₅ is a carbon atom to which the remainder of the molecule is attached; Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁, W₂, W₃ are independently CR₄R₄ O, N—R₁, or S═(O)_(r) (r=0-2) with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and t=1-4.
 14. The compound according to claim 1 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₅ and Z₆ are independently CR₂, N, O, S or N—R₁ provided one of Z₁-Z₆ is a carbon atom to which the remainder of the molecule is attached; Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁, W₂ and W₃ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and t=1 to
 3. 15. The compound according to claim 1 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ and Z₈ are independently CR₂, N, O, S or N—R₁ provided one of Z₁-Z₈ is a carbon atom to which the remainder of the molecule is attached; Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁, and W₂ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q), optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and t=1 to
 2. 16. The compound according to claim 1 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃ and Z₄ are independently CR₂, N, O, S or N—R₁ provided one of Z₁-Z₄ is a carbon atom to which the remainder of the molecule is attached; Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁, W₂, W₃, W₄ and W₅ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; t=1 to 3; and u=1 to
 3. 17. The compound according to claim 1 wherein the compound has the formula

and wherein X is S.
 18. The compound according to claim 1 wherein X is S.
 19. The compound according to claim 1 selected from the group consisting of a. (5R,6Z)-6-(Imidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; b. (5R,6Z)-6-[(7-methoxyimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; c. (5R,6Z)-6-[(7-chloroimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; d. (5R),(6Z)-6-Imidazo[1,2-a]quinolin-2-ylmethylene-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; e. (5R),(6Z)-6-(6,7-dihydro-5H-cyclopenta[d]imidazo[2,1-b][1,3]thiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; f. (5R),(6Z)-6-(Imidazo[1,2-a]quinoxaline-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hepto-2-ene-2-carboxylic acid, sodium salt; g. (5R,6Z)-6-[(7-methylimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; h. (5R), (6Z)-6-(4,5,6,7-tetrahydro-1,3a,3b,8-tetraaza-cyclopenta[a]indene-2-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid sodium salt; i. (5R,6E)-6-[(10-benzyl-11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-8-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; j. 6-(5-ethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacen-2-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid; k. (5R,6E&Z)-7-oxo-6-(4H,10H-pyrazolo[5,1-c][1,4]benzoxazepin-2-ylmethylene)₄-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; l. (5R), (6Z)-6-(5H-Imidazo[2,1-a]isoindol-2-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid sodium salt; m. (5R,6Z)-6-[(5-methylimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; n. (5R,6Z)-6-[(7-fluoroimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; o. (5R),(6Z)-6-(5,8-dihydro-6H-imidazo[2,1-b]pyrano[4,3-d][1,3]thiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; p. (5R),(6Z)-6-(imidazo[2,1-b]bebzothiazol-7-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; q. (5R),(6Z)-7-oxo-6-([1,3]thiazolo[3,2-a]benzimidazol-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; r. (5R),(6Z)-6-(7,8-dihydro-6H-cyclopenta[3,4]pyrazolo[5,1-b][1,3]thiazol-2-ylmethylene)-7-oxo-6-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; s. (5R),(6Z)-7-oxo-6-(5,6,7,8-tetrahydroimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; t. (5R),(6Z)-8-[(9-methyl-9H-imidazo[1,2-a]benzimidazol-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; u. (5R,6Z)-7-oxo-6-(4H-thieno[2′,3′:4,5]thiopyrano[2,3-b]pyridin-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid (Sodium salt); v. (5R,6Z)-6-[(5-methyl-7,8-dihydro-6H-cyclopenta[e][1,2,4]triazolo[1,5-a]pyrimidin-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; w. (5R,6Z)-6{[7-(ethoxycarbonyl)-6,7,8,9-tetrahydropyrido[3,4-e][1,2,4]triazolo[1,5-a]pyrimidin-2-yl]methylene}-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; x. (5R,6Z)-6-(8′,9′-dihydro-6′H-spiro[1,3-dioxolane-2,7′-[1,2,4]triazolo[1,5-a]quinazolin]-2′-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; y. (5R,6Z)-6-[(5-methyl-6,7,8,9-tetrahydro[1,2,4]triazolo[1,5-a]quinazolin-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; z. (5R,6Z)-6-[(5-methoxy-7,8-dihydro-6H-cyclopenta[e]imidazo[1,2-a]pyrimidin-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; aa. (5R,6Z)-6-({5-[2-(benzyloxy)ethoxy]-7,8-dihydro-6H-cyclopenta[e]imidazo[1,2-a]pyrimidin-2-yl}methylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; bb. (5R,6Z)-6-(2,3-dihydro[1,3]thiazolo[3,2-a]benzimidazol-6-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; cc. (5R,6Z)-6-(3,4-dihydro-2H-[1,3]thiazino[3,2-a]benzimidazol-7-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; dd. (5R,6Z)-7-oxo-6-([1,3]thiazolo[3,2-a]benzimidazol-6-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; ee. (5R,6Z)-6-(7,8-dihydro-5H-pyrano[4,3-d]pyrazolo[5,1-b][1,3]oxazol-2-ylmethylene)7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; ff. (5R,6Z)-7-oxo-6-(5,6,7,8-tetrahydropyrazolo[5,1-b][1,3]benzoxazol-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; and gg. (5R,6Z)-6-{[6-(ethoxycarbonyl)-5,6,7,8-tetrahydropyrazolo[5′,1′:2,3][1,3]oxazolo[5,4-c]pyridin-2-yl]methylene}-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt.
 20. The compound according to claim 19 selected from the group consisting of (5R),(6Z)-6-(6,7-dihydro-5H-cyclopenta[d]imidazo[2,1-b][1,3]thiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; and (5R),(6Z)-6-(5,8-dihydro-6H-imidazo[2,1-b]pyrano[4,3-d][1,3]thiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid.
 21. The compound according to claim 20, (5R),(6Z)-6-(6,7-dihydro-5H-cyclopenta[d]imidazo[2,1-b][1,3]thiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid.
 22. A method for the treatment of bacterial infection or disease in a patient in need thereof which comprises providing to said patient an effective amount of a compound of formula I:

wherein: one of A and B denotes hydrogen and the other an optionally substituted fused tricyclic heteroaryl group; X is S or O; R₅ is H, C1-C6 alkyl, C5-C6 cycloalkyl, or CHR₃OCOC1-C6alkyl; and R₃ is hydrogen, C1-C6 alkyl, C5-C6 cycloalkyl, optionally substituted aryl, or optionally substituted heteroaryl; or a pharmaceutically acceptable salt or in vivo hydrolysable ester thereof.
 23. The method according to claim 22 wherein the compound is co-administered with a betalactam antibiotic.
 24. The method according to claim 22 wherein the ratio of β-lactam antibiotic to the compound is in a range from about 1:1 to 100:1.
 25. The method according to claim 24 wherein the ratio of the β-lactam antibiotic to the compound is less than 10:1.
 26. The method according to claim 22 wherein the tricyclic heteroarylgroup has the formula

wherein Z₁, Z₂, Z₃, Z₄, Z₅, Z₆ and Z₇ are independently CR₂, N, O, S or N—R₁ provided one of Z₁-Z₇ is a carbon atom to which the remainder of the molecule is attached; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and Y₁, Y₂, Y₃ and Y₄ may independently be C or N.
 27. The method according to claim 22 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ and Z₈ are independently CR₂, N, O, S or N—R₁ provided one of the Z₁-Z₈ is a carbon atom to which the remainder of the molecule is attached; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and Y₁, Y₂, Y₃ and Y₄ are independently C or N.
 28. The method according to claim 22 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ and Z₈ are independently CR₂, N, O, S or N—R₁ provided one of Z₁-Z₈ is a carbon atom to which the remainder of the molecule is attached; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q), optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and Y₁, Y₂, Y₃ and Y₄ are independently C or N.
 29. The method according to claim 22 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ and Z₉ are independently CR₂, N, O, S or N—R₁ provided one of the Z₁-Z₉ is a carbon atom to which the remainder of the molecule is attached; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and Y₁, Y₂, Y₃ and Y₄ are independently C or N.
 30. The method according to claim 22 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃ and Z₄ are independently CR₂, N, O, S or N—R₁ provided one of Z, Z₄ is a carbon atom to which the remainder of the molecule is attached; Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁, W₂ and W₃ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and t=1 to
 3. 31. The method according to claim 22 wherein the tricyclic heteroaryl group is

wherein Z₁-Z₂, Z₃, Z₄ and Z₅ are independently CR₂, N, O, S or N—R₁ provided one of Z₁-Z₅ is a carbon atom to which the remainder of the molecule is attached; Y₁, and Y₂ are independently C or N; W₁, W₂ and W₃ are independently CR₄R₄, S(O)r (r=0-2)S, O or N—R , with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and t=1 to
 3. 32. The method according to claim 22 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₄ and Z₆ are independently CR₂, N, O, S, and N—R₁; provided one of Z₁-Z₆ is a carbon atom to which the remainder of the molecule is attached; Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁ and W₂ are independently CR₄R₄, S(O)r (r=0-2), O, N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and t=1 to
 3. 33. The method according to claim 22 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₄, Z₄ and Z₇ are indepdently CR₂, N, O, S or N—R₁ provided one of the Z₁-Z₇ is a carbon atom to which the remainder of the molecule is attached; Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁ and W₂ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and t=0-3.
 34. The method according to claim 22 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂ and Z₃ are independently CR₂ N, O, S or N—R₁ provided one of Z₁-Z₃ is a carbon atom to which the remainder of the molecule is attached; Y₁ and Y₄ are independently C or N; Y₂ and Y₃ are independently CH or N; W₁, W₂ W₃, W₄ and W₅ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; t=0 to 2; and u=1 to
 3. 35. The method according to claim 22 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈ and Z₉ are independently CR₂, N, O, S or N—R₁ provided one of the Z₁-Z₉ is a carbon atom to which the remainder of the molecule is attached; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q), optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and Y₁, Y₂, Y₃ and Y₄ are independently C or N.
 36. The method according to claim 22 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇, Z₈, Z₉ and Z₁₀ are independently CR₂, N, O, S or N—R₁ provided one of Z₁-Z₁₀ is a carbon atom to which the remainder of the molecule is attached; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q), optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and Y₁, Y₂, Y₃ and Y₄ are independently C or N.
 37. The method according to claim 22 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄ and Z₅ are independently CR₂, N, O, S or N—R₁ provided that one of Z₁-Z₅ is a carbon atom to which the remainder of the molecule is attached; Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁, W₂, W₃ are independently CR₄R₄ O, N—R₁, or S═(O)_(r) (r=0-2) with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and t=1-4.
 38. The method according to claim 22 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₅ and Z₆ are independently CR₂, N, O, S or N—R₁ provided one of Z₁-Z₄ is a carbon atom to which the remainder of the molecule is attached; Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁, W₂ and W₃ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and t=1 to
 3. 39. The method according to claim 22 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃, Z₄, Z₅, Z₆, Z₇ and Z₈ are independently CR₂, N, O, S or N—R₁ provided one of Z₁-Z₈ is a carbon atom to which the remainder of the molecule is attached; Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁ and W₂ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q), optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; and t=1 to
 2. 40. The method according to claim 22 wherein the tricyclic heteroaryl group is

wherein Z₁, Z₂, Z₃ and Z₄ are independently CR₂, N, O, S or N—R₁ provided one of Z₁-Z₄ is a carbon atom to which the remainder of the molecule is attached; Y₁, Y₂, Y₃ and Y₄ are independently C or N; W₁, W₂, W₃, W₄ and W₅ are independently CR₄R₄, S(O)r (r=0-2), O, or N—R₁ with the proviso that no S—S, S—O or O—O bond formation can occur to form a saturated ring; R₁ is H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or mono or bicyclic saturated heterocycles, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl with the proviso that neither the double bond nor the triple bond should be present at the carbon atom which is directly linked to N; optionally substituted perfluoroalkyl, —S(O)_(p) optionally substituted alkyl or aryl where p is 0-2, optionally substituted —C═Oheteroaryl, optionally substituted —C═Oaryl, optionally substituted —C═Oalkyl, optionally substituted —C═Ocycloalkyl, optionally substituted —C═O mono or bicyclic saturated heterocycles, optionally substituted C1-C6 alkylaryl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted aryl-C1-C6alkyl, optionally substituted heteroaryl-C1-C6alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, —CONR₆R₇, —SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted -alkyl-O-alkyl-aryl, optionally substituted -alkyl-O-alkyl-heteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, optionally substituted C1-C6alkylaryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted alkylaryloxyalkylamines, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, or optionally substituted heteroaryloxy carbonyl; R₂ is hydrogen, optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, halogen, cyano, N—R₆R₇, optionally substituted C1-C6 alkoxy, hydroxy; optionally substituted aryl, optionally substituted heteroaryl, COOR₆, optionally substituted alkylaryloxyalkylamines, optionally substituted aryloxy, optionally substituted heteroaryloxy, optionally substituted C3-C6 alkenyloxy, optionally substituted C3-C6 alkynyloxy, C1-C6 alkylamino-C1-C6 alkoxy, alkylenedioxy, optionally substituted aryloxy-C1-C6 alkyl amine, C1-C6 perfluoro alkyl, S(O)_(q)-optionally substituted C1-C6 akyl, S(O)_(q)— optionally substituted aryl where q is 0, 1 or 2, CONR₆R₇, guanidino or cyclic guanidino, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted C1-C6 alkylheteroaryl, optionally substituted heteroaryl-C1-C6 alkyl, optionally substituted C1-C6 alkyl mono or bicyclic saturated heterocycles, optionally substituted arylalkenyl of 8 to 16 carbon atoms, SO₂NR₆R₇, optionally substituted arylalkyloxyalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted aryloxyaryl, optionally substituted aryloxyheteroaryl, substituted heteroaryloxyaryl, optionally substituted C1-C6alkyl aryloxyaryl, optionally substituted C1-C6 alkylaryloxyheteroaryl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, or optionally substituted alkylaryloxyalkylamine; R₄ is H, optionally substituted C1-C6 alkyl, OH (provided both R₄ are not OH), C1-C6 alkoxy, —S—C1-C6 alkyl, COOR₆, —NR₆R₇, —CONR₆R₇; or R₄R₄ may together be ═O or R₄R₄ together with the carbon to which they are attached may form a spiro system of five to eight members with or without the presence of heteroatoms selected N, O, S(O)_(n) (where n=0 to 2), N—R₁; R₆ and R₇ are independently H, optionally substituted C1-C6 alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted C1-C6 alkyl aryl, optionally substituted arylalkyl, optionally substituted heteroarylalkyl, optionally substituted C1-C6 alkyl heteroaryl, or R₆ and R₇ can be together to form a 3-7 membered saturated ring system optionally having one or two heteroatoms selected from N—R₁, O, and S(O)_(n) n=0-2; t=1 to 3; and u=1 to
 3. 41. The method according to claim 22 wherein the compound has the formula

and wherein X is S.
 42. The method according to claim 22 wherein X is S.
 43. The method according to claim 22 wherein the compound is selected from the group consisting of a. (5R,6Z)-6-(Imidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; b. (5R,6Z)-6-[(7-methoxyimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; c. (5R,6Z)-6-[(7-chloroimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; d. (5R),(6Z)-6-Imidazo[1,2-a]quinolin-2-ylmethylene-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; e. (5R),(6Z)-6-(6,7-dihydro-5H-cyclopenta[d]imidazo[2,1-b][1,3]thiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; f. (5R),(6Z)-6-(Imidazo[1,2-a]quinoxaline-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hepto-2-ene-2-carboxylic acid, sodium salt; g. (5R,6Z)-6-[(7-methylimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; h. (5R), (6Z)-6-(4,5,6,7-tetrahydro-1,3a,3b,8-tetraaza-cyclopenta[a]indene-2-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid sodium salt; i. (5R,6E)-6-[(10-benzyl-1]-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-8-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; j. 6-(5-ethoxy-7,8-dihydro-6H-3,4,8b-triaza-as-indacen-2-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid; k. (5R,6E&Z)-7-oxo-6-(4H, 10H-pyrazolo[5,1-c][1,4]benzoxazepin-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; l. (5R), (6Z)-6-(5H-Imidazo[2,1-a]isoindol-2-ylmethylene)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid sodium salt; m. (5R,6Z)-6-[(5-methylimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; n. (5R,6Z)-6-[(7-fluoroimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; o. (5R),(6Z)-6-(5,8-dihydro-6H-imidazo[2,1-b]pyrano[4,3-d][1,3]thiazol-2-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; p. (5R),(6Z)-6-(imidazo[2,1-b]bebzothiazol-7-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; q. (5R),(6Z)-7-oxo-6-([1,3]thiazolo[3,2-a]benzimidazol-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; r. (5R),(6Z)-6-(7,8-dihydro-6H-cyclopenta[3,4]pyrazolo[5,1-b][1,3]thiazol-2-ylmethylene)-7-oxo-6-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; s. (5R),(6Z)-7-oxo-6-(5,6,7,8-tetrahydroimidazo[2,1-b][1,3]benzothiazol-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; t. (5R),(6Z)-8-[(9-methyl-9H-imidazo[1,2-a]benzimidazol-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid; u. (5R,6Z)-7-oxo-6-(4H-thieno[2′,3′:4,5]thiopyrano[2,3-b]pyridin-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid (Sodium salt); v. (5R,6Z)-6-[(5-methyl-7,8-dihydro-6H-cyclopenta[e][1,2,4]triazolo[1,5-a]pyrimidin-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; w. (5R,6Z)-6-{[7-(ethoxycarbonyl)-6,7,8,9-tetrahydropyrido[3,4-e][1,2,4]triazolo[1,5-a]pyrimidin-2-yl]methylene}-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; x. (5R,6Z)-6-(8′,9′-dihydro-6′H-spiro[1,3-dioxolane-2,7′-[1,2,4]triazolo[1,5-a]quinazolin]-2′-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; y. (5R,6Z)-6-[(5-methyl-6,7,8,9-tetrahydro[1,2,4]triazolo[1,5-a]quinazolin-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; z. (5R,6Z)-6-[(5-methoxy-7,8-dihydro-6H-cyclopenta[e]imidazo[1,2-a]pyrimidin-2-yl)methylene]-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; aa. (5R,6Z)-6-({5-[2-(benzyloxy)ethoxy]-7,8-dihydro-6H-cyclopenta[e]imidazo[1,2-a]pyrimidin-2-yl}methylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; bb. (5R,6Z)-6-(2,3-dihydro[1,3]thiazolo[3,2-a]benzimidazol-6-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; cc. (5R,6Z)-6-(3,4-dihydro-2H-[1,3]thiazino[3,2-a]benzimidazol-7-ylmethylene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; dd. (5R,6Z)-7-oxo-6-([1,3]thiazolo[3,2-a]benzimidazol-6-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; ee. (5R,6Z)-6-(7,8-dihydro-5H-pyrano[4,3-d]pyrazolo[5,1-b][1,3]oxazol-2-ylmethylene)7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; ff. (5R,6Z)-7-oxo-6-(5,6,7,8-tetrahydropyrazolo[5,1-b][1,3]benzoxazol-2-ylmethylene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt; and gg. (5R,6Z)-6-{[6-(ethoxycarbonyl)-5,6,7,8-tetrahydropyrazolo[5′,1′:2,3][1,3]oxazolo[5,4-c]pyridin-2-yl]methylene}-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, sodium salt.
 44. A pharmaceutical composition which comprises a pharmaceutically acceptable carrier and an effective amount of a compound as defined in claim 1 or a pharmaceutically acceptable salt or in vivo hydrolysable ester thereof. 